Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb9029ea1a1d843…

MALICIOUS

PDF

86.7 KB Created: 2021-09-12 22:14:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2b62c5ecf8c801912466e31feddc0bfc SHA-1: 7a9d19b931d9d2ee324459e4948c5ac2435866b3 SHA-256: deb9029ea1a1d843c46f52c22ef0263daafd3ad48782509538137dbbfae7054b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phish users. The presence of embedded JavaScript indicates an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://martom24.pl/martom/userfiles/file/zubirunixivekojalu.pdf In PDF document text
    • http://cross-winds.in/upload/contents/images/images/dipujegizazija.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/68104309648.pdfIn PDF document text
    • http://hjhchem.com/upload/files/pezofemat.pdfIn PDF document text
    • https://amgaa.org/temp/files/78584772161.pdfIn PDF document text
    • https://kebecelectrique.com/upload/editor/file/jodikabivexagon.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef1eeb8d8d---rulofuluwazefemifebaxuso.pdfIn PDF document text
    • https://www.gpaci.org.br/cms/ckfinder/userfiles/files/88599332691.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee36821b69---dasebawilijun.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138d75173a0b---51444405648.pdfIn PDF document text
    • http://livingkaneohe.com/userimages/regumagaromo.pdfIn PDF document text
    • http://onfireinteriors.com/userfiles/86312017625.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/gufabobum.pdfIn PDF document text
    • http://artospace.com/pics/file/firalepapeb.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/tujexunojuwev.pdfIn PDF document text
    • https://pmsp-me.com/userfiles/files/zumamibogavabum.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16139f6d6357f2---velipukenut.pdfIn PDF document text
    • http://lingvastar.z-i-g-z-a-g.com/userfiles/files/vexufosovo.pdfIn PDF document text
    • http://tnslib.tools/userfiles/files/wepixorurefurokizikaw.pdfIn PDF document text
    • https://birgatour.mn/js/ckfinder/userfiles/files/295479660.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/3bfd8bfba5ab43e6849635ff4b776f7e/2038569916.pdfIn PDF document text
    • http://pastadimatteo.com/ckfinder/userfiles/files/68574326835.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/21553190599.pdfIn PDF document text
    • http://chemtron-vostok.ru/media/file/wizotadebuv.pdfIn PDF document text
    • https://2acontractor.it/images/file/37380586417.pdfIn PDF document text
    • https://smobiil.eu/userfiles/files/16876138868.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131f9b3b62a2---bajefem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=habitbox+app+androidPDF 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_off0000f1a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A2 10272 bytes
SHA-256: 976a74fc1ca88083f3a44b207f59f402e707b1e2478d50444d67007feccb4aa4
font_01_sfnt_off00010895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10895 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A7 17180 bytes
SHA-256: bda1be34d9e0e1dd63cf3cefc793f6cf5b46916f7e556d38049b690067ee33bf

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