Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0b42e55fd52494…

MALICIOUS

PDF

75.2 KB Created: 2021-02-12 23:54:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3e6e5c4e2e5f1f6e592588cb0281fbd3 SHA-1: e7b8bf3f3375ee4336f590deed681bedec65ed23 SHA-256: 2e0b42e55fd5249409782bd218e6f0188cbbe5faada28436e25f963f664d6b60
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and exhibiting link farm characteristics, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

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://jottigo.ru/123?utm_term=rise+of+the+guardians+pitch+black+fanfiction PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414166/normal_602206c1ea097.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451567/normal_601cb70f4dcfa.pdfIn PDF document text
    • https://cdn.sqhk.co/giruzegovu/vje1jbV/traffic_moto_bike_attack_race_mod_apk.pdfIn PDF document text
    • http://xixubitawub.iblogger.org/portion_size_canada_food_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410965/normal_6000bd63a5025.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499995/normal_5fdda0a4187e5.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/4QiWxjd/dj_songs_mixing_download_telugu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rubujizuz.epizy.com/two_letter_english_words.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/47633078412.pdfIn PDF document text
    • http://poluwusafoge.epizy.com/fallout_new_vegas_gun_runners_challenges_guide.pdfIn PDF document text
    • http://suvuxugoboboju.rf.gd/dante_s_inferno_psp_games.pdfIn PDF document text
    • http://bolozenafo.rf.gd/future_continuous_tense_worksheet_for_class_6.pdfIn PDF document text
    • http://bedekopezedegej.rf.gd/55448170292.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/free_iphone-_activation-_bypass._rar.pdfIn PDF document text
    • http://kewatolod.rf.gd/bijopawawokexesu.pdfIn PDF document text
    • http://pelewonaxiguso.epizy.com/48372139149.pdfIn PDF document text
    • http://nenumezamotimi.epizy.com/dediwanexuxipef.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/7166644844.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_off0000e896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE896 5628 bytes
SHA-256: 268c9f115446120bcaf942bafdb4fb958a98219014529fcda71e2656ea1d7f69
font_01_sfnt_off0000fbb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB4 10436 bytes
SHA-256: 4c19562f8c798c1015557e23507a3d677886216bbfe516c9746cb343c558d6ce

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