Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee14c2cccbff047a…

MALICIOUS

PDF

67.7 KB Created: 2021-04-25 08:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e1e258a033aeff9417b49387f99820c1 SHA-1: f21999958f3d492d881314620ad05dcedcfb5307 SHA-256: ee14c2cccbff047a634f6bfdf443cc41400385e2980190b78b5ffd0b7071e68a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The document body and embedded URLs suggest a phishing or scam attempt, masquerading as an answer key to lure users to external sites. The presence of multiple disposable hosting links further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=the+cask+of+amontillado+worksheet+answer+key PDF link annotation
    • https://cdn.sqhk.co/jefigujaxev/ggfHSoG/horizon_hobby_order_tracking.pdfIn PDF document text
    • http://becloud.website/45988789541f3den.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://usesalle.xyz/33326578871165b0.pdfIn PDF document text
    • https://cdn.sqhk.co/depadukat/fghhiBX/faziko.pdfIn PDF document text
    • http://jidudilubad.mygamesonline.org/11948138986.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496580/normal_6006b84ab1c10.pdfIn PDF document text
    • http://snapchat-alert.com/601056900529guht.pdfIn PDF document text
    • http://resimpub.com/active_listening_techniques_paraphrasing5jr9j.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/punejed.pdfIn PDF document text
    • http://babbieshop.ru/430176639881u78a.pdfIn PDF document text
    • http://vovpomnim.ru/devi_kavacham_lyrics_in_kannada58uqh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379240/normal_605daabc64f2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428334/normal_5fda940220b72.pdfIn PDF document text
    • http://gnoogle.site/lenerisevagidizavamusubokur0rt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483855/normal_6005b0f8e26ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387814/normal_5fddfbce7badd.pdfIn PDF document text
    • https://cdn.sqhk.co/dasewugiru/ciewhji/rigakugalatupunepilajox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417319/normal_602a72de53425.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bavotuvezomevi.myartsonline.com/86246020117.pdfIn PDF document text
    • http://kikanelomer.onlinewebshop.net/16259542404.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_off0000cbb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB6 5468 bytes
SHA-256: cceb3586fa4f6dafe9d26ee7352bc59499270934e315b5091464f38be6f67f04
font_01_sfnt_off0000de3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3D 10344 bytes
SHA-256: 74c4c69945450975af3a43292d44e13bf58d503e159ff259b7cf982af6891488

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