Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dee668cac383859…

MALICIOUS

PDF

77.1 KB Created: 2021-02-28 20:12:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: da19aa5f796e364255087ce1d3c601e0 SHA-1: 6303cb5246971f8bc8e2f5a2200e13bccea5f5b2 SHA-256: 0dee668cac383859b6bf8726051d7373f846a44a1b0ea988b433ecff433c9b34
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with the primary one being `https://jumiwimov.ru/award?keyword=which+pasta+machine+is+best`, suggesting a phishing or malware distribution lure. The document body, though heavily obfuscated, appears to contain metadata related to its creation, reinforcing the idea that the content is designed to mask the malicious URLs.

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://jumiwimov.ru/award?keyword=which+pasta+machine+is+best PDF link annotation
    • https://cdn.sqhk.co/tarekekog/jdJiehb/34365742954.pdfIn PDF document text
    • https://cdn.sqhk.co/zivupowixede/hYTohbV/download_equalizer_fx_pro_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/lukizigerex/haL1hgg/senenuxaj.pdfIn PDF document text
    • https://cdn.sqhk.co/satukevaguka/haifCif/28590677408.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410004/normal_600a432148d98.pdfIn PDF document text
    • https://cdn.sqhk.co/javijaxim/Q7ijief/26745217046.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/W4H8fGz/fantasy_wars_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389616/normal_601aa45cc4d6c.pdfIn PDF document text
    • http://libuwapuvewipev.mywebcommunity.org/20156632029.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/how_to_read_taf_aviation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418391/normal_603af9f853632.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402722/normal_5fca86bb223fb.pdfIn PDF document text
    • http://navevukosuso.mypressonline.com/xajasipemibololupubureliv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407327/normal_601254b1a9af7.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/ngejijj/0-_60_mph_distance_calculator.pdfIn PDF document text
    • http://dizurexemubegog.mygamesonline.org/42662133207.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tixofimisupabev.onlinewebshop.net/26763516689.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/96556508974.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/supajapatiruzajanofenov.pdfIn 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_off0000f15d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15D 5196 bytes
SHA-256: a02a88a906b48a3e8c2d8a81395b9e46a899a7c69c8114080ae5e11ba4a7f3ac
font_01_sfnt_off000102f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F1 10788 bytes
SHA-256: cb8fe79fc6a8d833a1785b12a6b58931e4c6b41f34f5f00c1e0712a41b1f53f1

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