Malicious PDF — malware analysis report

Static analysis result for SHA-256 495f516ce971571f…

MALICIOUS

PDF

82.8 KB Created: 2021-09-21 16:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6b16a46cd507e83d4b1f83fd1939d9d5 SHA-1: dedadc119f835ab513963f46eaaf267dad3f5bc3 SHA-256: 495f516ce971571f1e215a02821b966f574423572cb9aee00f9913e37c128e24
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and the ML classifier assigned a high probability of maliciousness. Heuristics indicate the document functions as a link farm, pointing to multiple domains, including compromised CMS uploads and disposable hosting. The presence of numerous external URIs suggests an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://location-venise.com/italie_documents/files/14252647282.pdf In PDF document text
    • http://kapalishakti.com/ckfinder/userfiles/files/momilozo.pdfIn PDF document text
    • http://xn--3bsx3iw22bmot.com/filespath/files/20210907131124.pdfIn PDF document text
    • https://essuances.com/ckfinder/userfiles/files/62585008233.pdfIn PDF document text
    • http://nessie-vinylcare.com/file/kibepoxuweliwobifafolo.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161494f571e906---lolidekavotawopebu.pdfIn PDF document text
    • https://coevent.ru/upload/files/fagopunixofaduwufo.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/b5ae3469a42ea07943a49552d95c2249/xipubaro.pdfIn PDF document text
    • http://bfcy88.com/uploads/files/74229839005.pdfIn PDF document text
    • http://songpinhao.com/userfiles/files/89638758839.pdfIn PDF document text
    • https://pchome.uzai.ca/upload/files/jegevevopalusurudokugo.pdfIn PDF document text
    • https://agrocare.ro/ckfinder/userfiles/files/zalurir.pdfIn PDF document text
    • http://turinimoti.com/assets/userfiles/file/41060716839.pdfIn PDF document text
    • https://mp2020.csysadmin.com/ckfinder/userfiles/files/44545853267.pdfIn PDF document text
    • http://zeamailer.zeapost.com/FCKeditor/editor/filemanager/connectors/userfiles/file/mazufaluradafoda.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/92932848954.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/94268457000.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/c91c10e4b7f083a314f0e557414b6d3c/76897658572.pdfIn PDF document text
    • http://bakineshr.az/ckfinder/userfiles/files/61782440932.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161326a90e504f---82575613582.pdfIn PDF document text
    • http://redemaisfarma.com/userfiles/file/67083794477.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/79204619508.pdfIn PDF document text
    • https://muzpony.de/obrazki/file/39155611169.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=redmi+6+pro+blank+display+solutionPDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFA 17696 bytes
SHA-256: 79fed2a29d6c3ef1d5a8de4a66565d04ef261df1a97a895cae90eb04562ef78d
font_01_sfnt_off000109fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12212 11212 bytes
SHA-256: a3186a3afb260e9f7604ee1546f94da3a03299bd32090253ebb0708520b06083