Malicious PDF — malware analysis report

Static analysis result for SHA-256 601e8ac59d36a713…

MALICIOUS

PDF

86.1 KB Created: 2021-07-23 13:33:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 95c170c12c1acab47db3805527da4990 SHA-1: 9e9e9d2ba3f5440f5218ebcbd6886e8ca0c98373 SHA-256: 601e8ac59d36a7132121193092c9908f2d9eec8e5210574feb35fe65968e3a81
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to various domains, many of which are hosted on compromised CMS upload storage or appear to be disposable. The document body is heavily obfuscated and unreadable, suggesting it is designed to obscure its malicious intent rather than convey information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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 https://bharatbiodiesel.com/userfiles/file/butogoj.pdf In PDF document text
    • http://didocrosby.com/imagenes/file/20627024268.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/28545566683.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098f118cec32---45386462405.pdfIn PDF document text
    • http://doreenindiatours.com/userfiles/file/sisewapuxavigoxa.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/48bbceuii7pgas86rae4q8da27/18656228905.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/14113213572.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/3gb84e0gq7l4kiu2hhofm0fc54/sobamisawija.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/bf63ebb718d549e422925284849c2569/44003879688.pdfIn PDF document text
    • https://dobre-akce.cz/media/files/file/37305651938.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160806f283183d---39396078765.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/386a03a0dcfbacbc7d32904406908f76/32345164485.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/i933f1tvcifaoiqkd9k0hrt003/95924159862.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/71d7034fb9a1bace6508aa30631a8984/fubawupilojelasag.pdfIn PDF document text
    • http://tochalco.com/uploads/files/12128479117.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/10081581612.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/putoratadaxoxifopasatugig.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b744370f11---86526944791.pdfIn PDF document text
    • http://clubmaniacr.com/campannas/file/wazinapokojerutabuzomolu.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/mudap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+many+ml+in+3+teaspoonsPDF 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_off0000ecfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFE 10676 bytes
SHA-256: aef506b87f02a4cf56317f0d31d1b0e8c6eb2fdf33bd3c93006d55716540d0a4
font_01_sfnt_off00010588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10588 16988 bytes
SHA-256: 6e24b26c31024d01d73f99bb30e90b337b7baf3d71eac0056afe1aa0a12c168f
font_02_sfnt_off0001322a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1322A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.