Malicious PDF — malware analysis report

Static analysis result for SHA-256 344803e9e1ee7f9f…

MALICIOUS

PDF

97.1 KB Created: 2021-03-05 14:23:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 2d3dae18669a0a896fdcabfa421c7dd3 SHA-1: 20de3c48ad1e3f921fe7bb4b69cbc58aa22fe43c SHA-256: 344803e9e1ee7f9f89ddc59b18afb3e068a7cfca6842c5b90f006c8649462679
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous embedded URLs, with a primary focus on directing users to external sites like 'xezojetit.ru' under the guise of providing a chapter summary. The document body, though heavily obfuscated, suggests a lure related to popular media to entice clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://xezojetit.ru/wix?keyword=silence+of+the+lambs+chapter+8+summary PDF link annotation
    • https://cdn.sqhk.co/bevoroxur/dLDdHVa/sword_art_online_game_review_ps4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451208/normal_601ed27080055.pdfIn PDF document text
    • http://jaxebememapi.iblogger.org/foolproof_answers_key_module_9.pdfIn PDF document text
    • http://zinuxuf.22web.org/app_store_for_laptop_windows_8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451027/normal_6030cf067555e.pdfIn PDF document text
    • https://cdn.sqhk.co/kagaxavog/hhpXhc6/30_days_lose_weight_workout_for_flat_stomach.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392867/normal_60418bf0b0f62.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzaxepigi/hiZshad/71821440326.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/gjp6did/56272445185.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478137/normal_6029919dcde5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388048/normal_60002d8b72f68.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://71da2aa5-51c3-4f2c-ab18-08bbbad20131.filesusr.com/ugd/d216cb_402690f43fea43b09b310afd139a6091.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/nsou_assignment_cover_page.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/wapuzafiponazigowo.pdfIn PDF document text
    • https://7c5e2310-e79b-429e-9f4a-70471a43dcce.filesusr.com/ugd/8ec1ef_310e386e5d194d728c656fa8c1a95866.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/peripheral_arteriopathy_guidelines.pdfIn PDF document text
    • https://cee4a208-09ac-40e0-983f-4c2cc776acbe.filesusr.com/ugd/5ed537_8a82c118044348a58c10f5718f860876.pdf?index=trueIn PDF document text
    • https://160e4e15-e27a-4ef2-9b26-f67fc0969a86.filesusr.com/ugd/cbdbb6_9244f05fa96f4c3e85354ef95e025309.pdf?index=trueIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F9F 5796 bytes
SHA-256: 2b83d9490fcd8aa58620a4d463afad3b888333767d8fd6bfd31b32eb5e710570
font_01_sfnt_off00015338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15338 10536 bytes
SHA-256: 7f698af715347a342572f2c80617b7a3307f2c18bccdc2e8720df91acac40cac

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