Malicious PDF — malware analysis report

Static analysis result for SHA-256 12cc4eb5196fbec2…

MALICIOUS

PDF

84.5 KB Created: 2021-08-19 17:33:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3cb77e0f80a600dbdc4e603e89155745 SHA-1: cdc39ba2138d5164c8d1c7f8da8196a6d8ba5f08 SHA-256: 12cc4eb5196fbec28191dc9e99eefe4f82e9ae258eb24c88ef0145ed9acfcfc6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, and it contains embedded JavaScript. The PDF also functions as a link farm, pointing to multiple compromised WordPress upload directories, suggesting an attempt to host malicious content or redirect users. The presence of JavaScript and the link farm indicate a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abfd2c90be2---37482414205.pdf In PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/gakadigowodufawafumexuro.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/19254709436.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7bccb07c19---36096839645.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/vjla8pcdpgjsipes3mis97af2d/10665397133.pdfIn PDF document text
    • http://digjamaica.com/app/webroot/files/96288641442.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607614f97e400---26069968297.pdfIn PDF document text
    • http://altinay-law.com/images/file/20260601200.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160aab31de9321---42656047725.pdfIn PDF document text
    • http://jaatkinson.com/userimages/mutuf.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b896ca468---32689823541.pdfIn PDF document text
    • http://petukmahaaaraj.com/userfiles/file/kiguvezifafojuxixamekivul.pdfIn PDF document text
    • https://dermatologie-francophone.com/userfiles/file/54822170239.pdfIn PDF document text
    • https://vienhung.com/webroot/img/files/43433564711.pdfIn PDF document text
    • https://sowlindia.com/userfiles/file/pokevotajagebumo.pdfIn PDF document text
    • http://poslovniimenik.net/firme_data/files/83634269614.pdfIn PDF document text
    • http://floral-design-lindgens.de/userfiles/file/solibubupiwizakekedaluwod.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/dupijarujitinewuv.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16086ba81d536f---6173836476.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/28894782585.pdfIn PDF document text
    • https://businesslife.com/content/files/68208557780.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/vubesupamilejaposal.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/nibixajudoku.pdfIn PDF document text
    • http://luingpyrex.cz/foto/Image/file/61673181031.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=what+are+the+general+characteristics+of+bryophytesPDF 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_off0000e845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE845 11004 bytes
SHA-256: e5dd34d886bef4ff326fc7f501252b91e2072564d467e7291bcda36d5771ec7a
font_01_sfnt_off00010199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10199 16288 bytes
SHA-256: 1eab99f0fb2de3735ffdd23a0307f50396c34549ba89b0d0618450b9e0b8cfb8
font_02_sfnt_off00012bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1