Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5b17b5b4dfb11d5…

MALICIOUS

PDF

84.5 KB Created: 2021-02-12 18:20:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 7cf483df223d20466930fbb9532c14ea SHA-1: ec95de01ebbceb0101a3a7c2473c6ec061c2e6f6 SHA-256: e5b17b5b4dfb11d58a8a6da4a58cc49c4474c3482b3140990ffc55b219b7ad7f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content, likely as part of a phishing campaign.

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://druttle.ru/wix?keyword=army+blc+study+guide PDF link annotation
    • https://cdn.sqhk.co/disumuneriva/gdtWgja/knight_of_swords_love_tarot_heaven.pdfIn PDF document text
    • http://tojasojula.iblogger.org/cool_movies_com_bollywood.pdfIn PDF document text
    • https://cdn.sqhk.co/dixufeja/cDNqhaU/94563421083.pdfIn PDF document text
    • http://zupurowuzuxule.iblogger.org/pujipinapugawoka.pdfIn PDF document text
    • http://najitop.22web.org/rugemuposowukot.pdfIn PDF document text
    • https://cdn.sqhk.co/tobepeliv/IMTjiha/34962429175.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/cgfgggj/voicemeeter_banana_discord_cutting_out.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420588/normal_5ff8353d12a16.pdfIn PDF document text
    • https://cdn.sqhk.co/kigifadarija/jdjduZV/12509088647.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxemetakol/ghPMjjt/65780406256.pdfIn PDF document text
    • http://zonafuluza.iblogger.org/gewev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nanaxaj.rf.gd/level_1_antiterrorism_awareness_training_test_answers.pdfIn PDF document text
    • http://zewomasajeguzud.epizy.com/35551118215.pdfIn PDF document text
    • http://ruxududomaba.epizy.com/gariboj.pdfIn PDF document text
    • http://putojoner.rf.gd/irritating_alarm_tones_free.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_off00010e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E56 5280 bytes
SHA-256: 39cee656095894a741b1ea56c3dfcd8722f344e20cba32092fab0790f89520e7
font_01_sfnt_off0001203c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1203C 10824 bytes
SHA-256: e89adabc321039eaad5601958d52639cf4fc93d01590e7ee57b4984c570a0279

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