Malicious PDF — malware analysis report

Static analysis result for SHA-256 c467ad46994f4859…

MALICIOUS

PDF

96.6 KB Created: 2021-06-30 05:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 173f36d1157f8a4adc49030ed8fcfd39 SHA-1: c2e8aaf5480809bf55dfaed4654defda82ad8c73 SHA-256: c467ad46994f4859a3cc0285a432ab73be10e3a2bfbd99f10217a6556435a8d7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress sites and other domains, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, indicating a tactic to obscure the true destination of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9747

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://laborke.ru/uplcv?utm_term=tdd+as+if+you+meant+it PDF link annotation
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/1dcec157akjjstvm7rsblneq04/pabikorekojolilabavusu.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6738e9f91---93591366265.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/b1c094baf8822d8acf2dada19124d73d/70318212350.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608849ecdddb6---woxikugo.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/b7fbebc11c6cd45b24b2eb0057c00b45/75370204884.pdfIn PDF document text
    • http://namjapizza.com/app/webroot/files/satugox.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d3212fcd9---dosuvodajelelolupeg.pdfIn PDF document text
    • https://biocoils.com/img/file/lorudida.pdfIn PDF document text
    • https://uniontend.com/userfiles/files/nerikabudemavademek.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a340d24c721---51698255934.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/e987mj83jr0cougap7mrfvpvmc/dafutedajidepibu.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/mhodhasv14hfai390u36e4l6vn/xasuvavifufe.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/kuvipunuvejerokew.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfa241ec59---48303449428.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/giwobabenazunip.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/4f49fb5041465e4693212839f8ca635c/pirub.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/d022981f35d59af1263c38c4a32b9515/newepodilosusujutofiw.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/43045877205.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9c3f62965---20009727290.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/fituvabaxenubale.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/afa8ac3173a72c0cb30facbfbed9b1a8/11993636303.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/pepnqkftgk60a375r7c963iu30/rejegonesorofupofaxeregos.pdfIn PDF document text
    • http://wenxuezj.com/images/File/verolak.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b092c6935a---likosura.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/id706h6c2ntot95c156b8hkbss/xorexusuniro.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/a5f46fd561f33a2623cb710695dcb053/fesepiduwo.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608c25db6bf55---45177991959.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11625 18512 bytes
SHA-256: 1e4dae5c7fa0bfd015309abdcdda4e3e7bb367d65ceae08e648a76c2d3be2078
font_02_sfnt_off000146a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146A0 10544 bytes
SHA-256: b859efcc8bf3a19a9b0f63108d802662eb933920cdee42aaf106e03e46bdb181
font_03_sfnt_off00015eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EAF 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae

Open this report in the interactive analyzer, or submit your own file for analysis.