Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ba93fc3ec2abc5…

MALICIOUS

PDF

56.4 KB Created: 2021-04-28 21:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: c18ca9415990cd5cfdd00dd933cf64b1 SHA-1: a23a8c4bfe2efcbf8c4b3603daef71d96f6569ef SHA-256: 01ba93fc3ec2abc58804cdc2ebed7e2fd3a94865748086d0b7e29726f133473c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to compromised WordPress sites, suggesting it is part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cac81b45f3---34234977844.pdf In PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/7be52e47915e15a7057c094f27d3c52d/denerirevexurufeviteve.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/qft6p6nt1secpkm6ohm9lmak3m/vabavoruna.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608853134693e---66815031446.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a80440a44815a503ccd9c57a7a0e64e1/55488680656.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/153752f1908dd466b354bf67918bd987/66482990627.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/c369c8fad1ec7584d87daa2e500f7b8d/23075759506.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/8be38c4085f8e32559d52c89e4a22ddf/wuzawid.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/4d75eff9dfb218722ff00a80c6e1abad/78604012329.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160893333ee804---7517422596.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607000f6c871d---tisesibaxov.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608846775e842---vasimilu.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/5r6pro5auepc891o8hjo1p7ns8/62428406252.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/9206dccae3325772fd55b6f593a738ff/45936104700.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/sj71en0fbn862is3sokvof5d6g/benufarivezaroraziz.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c416dde788---41062510909.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=crystal+reports+viewer+database+connector+errorPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE19 5368 bytes
SHA-256: 346c4c8adc4acdbfadeac1f3c35e475ac8ac20fad5ecd3867c9cf5503086118f

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