Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b4d02a7fc5f3a1d…

MALICIOUS

PDF

65.6 KB Created: 2021-09-07 15:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 120d7e90c4e837589bde283f628dbf0e SHA-1: 69d330a7766f91353efe8791b2bec469c797c064 SHA-256: 7b4d02a7fc5f3a1de11030357412509a66099780d9fe45fda662fe12bd3c066f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to potentially compromised websites or disposable hosting, indicating a link farm or phishing lure. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's intended to redirect users to malicious content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6298

Heuristics 5

  • 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
  • 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://aktifbant.com/resimler/files/51472119100.pdf In PDF document text
    • https://98ing.com/upload/ck/files/20210629_204221.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610b1f428badb---70130808132.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed760ebf51---70213630041.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/pekokiwip.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/juguxabe.pdfIn PDF document text
    • http://dzirerealtors.com/uploads/31631215483.pdfIn PDF document text
    • http://humanlitech.com/files/files/46115935459.pdfIn PDF document text
    • https://keongracun.org/contents//files/beluderevo.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/86386779692.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/e644ebce2ef87090028b834311c50d4a/sopifajetep.pdfIn PDF document text
    • https://rhodium.vn/uploads/news_file/zivenakozofivafo.pdfIn PDF document text
    • http://adacu.org/userfiles/file/20210724214335.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/wineg.pdfIn PDF document text
    • http://rajhansnursery.com/userfiles/file/wagefebi.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/98450249035.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ced9950270---18320530623.pdfIn PDF document text
    • http://abbwingslynnhaven.com/uploads/files/mobaxalujijubidakanirijib.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/93fdcb184a32482f6f98b7f051e15949/vamasatetafudokafuvuk.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/c4755ff8d4e65a50bdaa986af1b5ac05/gabeju.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/98i7ihfkjudhabphqdo54sobo6/81652004537.pdfIn PDF document text
    • http://architettotamborra.eu/userfiles/files/dopekumibajisuzedunade.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=the+untethered+soul+full+pdf+freePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE9B 17984 bytes
SHA-256: 8e0824f8f57112bd71cc8ae4b5e43764ffc9d022012da7ca0e5cb276a5e96339
font_01_sfnt_off0000ed54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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