Malicious PDF — malware analysis report

Static analysis result for SHA-256 3be437019d08009c…

MALICIOUS

PDF

81.5 KB Created: 2021-06-28 15:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f96c3ca0540190627a04ed98bbda6a57 SHA-1: edf2ca0af7c3a0164e92d2efa2da6421f705d20f SHA-256: 3be437019d08009c30d3612c0b91aa3c5abd5bb24fa2360d8265cd0cabc1a80c
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a phishing lure. The document's content, though heavily obfuscated in the provided excerpt, is designed to trick users into revealing sensitive recovery information. The presence of numerous links to compromised WordPress sites and disposable hosting suggests an attempt to distribute malicious content or redirect users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/4ngtrmud61l5el1jgrhmt405a4/18804023682.pdf In PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/moxibarogumibukixuter.pdfIn PDF document text
    • https://vate-tire.ru/wp-content/plugins/super-forms/uploads/php/files/0217253892bf97e890dc828e97937184/30348350065.pdfIn PDF document text
    • http://zgic.ru/!upload/files/fubixuta.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/e2ce2374a5d9da07520c8a5a56a846a4/wusuwarujufal.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/68254152894.pdfIn PDF document text
    • http://ashioke.com/images/library/File/vupoxebavegidipukiduza.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16075021605cfd---43182195148.pdfIn PDF document text
    • http://windmill-bv.com/userfiles/files/pukit.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d65f193670265e9420b5e9c9d63c47c5/73899469274.pdfIn PDF document text
    • http://ji-tien.com/userfiles/file/dafasusa.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c745f83a768---libuxa.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2620905b5---90009419658.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/40583546041.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/354ba85d9c5002c5677ea697e766d11f/keripuzobap.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/450bdd7ead6cae6845551b71857e14ce/xegeta.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/81113181880.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/ridudawanefoni.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff51bde737---fobezejoben.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8afa1bbd5---24723737977.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb7a4ac660---ledamodilasujubofuk.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f47657db3---34597211566.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=message+digest+in+cryptographyPDF 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_off0000d94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94C 17896 bytes
SHA-256: 824a78ef4c345d4a6f4e5ac0994bbc12f4919f2d26e74e50d8e58788fee2f729
font_01_sfnt_off00010847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10847 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001205e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1205E 10852 bytes
SHA-256: e175a2f52fd3f5b58cd610fd1235fecf55c064941aea9a3a3eadf80af49b8a35

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