Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f508ad3e191c5a…

MALICIOUS

PDF

72.1 KB Created: 2021-06-20 13:50:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: efbf6ebcc9b525779fa42a7ac00aa142 SHA-1: 173e0f5d836016f847200c9636948251358a20cd SHA-256: c2f508ad3e191c5a6fc72f6de9cb8eba54a8b04acb6189400998a37a67f6db88
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute malicious content or phish for information. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160c7926a5f5a9---33764709638.pdf In PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/sodijogo.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928375e770c---kizoluzavafowe.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d153a8237---xatikawebawajuwi.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a734029b1---64616994612.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/cfc76b84a76c2957c9f97c349c00898d/97812047577.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/p2mun1uen63p22t23k5g5kk45m/tarusif.pdfIn PDF document text
    • https://osakadentalcare.com/contents//files/15964957984.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/6f19f06f0d5ee30c88d951c49343be3e/7350990315.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/j73ba64bgil4mufe2ntnqjdj29/wawasilaguxabawol.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/pemomafanamezefonan.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/kopatokipiw.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/thh92kj6uosiafsh81pq80egd0/xamusor.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/19242297234.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/09u7ekaue6edrgnrvg215lhq0q/kamaw.pdfIn PDF document text
    • https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/2ca2caa8aed4778841a77d874a4622a8/39219867793.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/t55qm53841b3f4gehtat2r79a0/94441985859.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/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=spin+the+wheel+cheat+apkPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF094 2960 bytes
SHA-256: ffe008f00bdab04e42d0fb58581e94ebe343bab047a3ea3be819508d06260cf3
font_01_sfnt_off0000fb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB04 5004 bytes
SHA-256: e6835c80f2840fccc7707c44e91edc0fb93ab2c818201e09e791fd0fc1787a5a

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