Malicious PDF — malware analysis report

Static analysis result for SHA-256 64da003938339672…

MALICIOUS

PDF

80.8 KB Created: 2021-03-22 18:50:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c5cbef68c4bad228c7ee8aedeec7fbf SHA-1: b4554bb1fb14c7bb9841348cd89df6fc5326440d SHA-256: 64da0039383396728a781448d9f5090e758831908984b360732fe7d0eec7a5c5
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in link farm attacks to improve search engine rankings or distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The document body, though partially garbled, suggests a lure related to logo design costs, directing users to potentially malicious URLs like 'https://ponafet.ru/strik'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=what+is+the+average+cost+to+have+a+logo+designed
    • http://esagafow.fun/zunamosagisijuforosod7dcs4.pdf
    • http://mon-compte-cmb.best/1896500028czexk.pdf
    • http://yesnutural.space/gedebanoxujultm740.pdf
    • https://paguzijap.weebly.com/uploads/1/3/1/4/131453408/funul_rulut.pdf
    • https://nabinavupofi.weebly.com/uploads/1/3/5/3/135350319/gexaverivinifarel.pdf
    • http://damvglaz2.xyz/chale_aana_song_by_mrjattfebhv.pdf
    • http://wersita.fun/61189322216cqdl8.pdf
    • http://lijovafe.22web.org/57110993838.pdf
    • https://timivoza.weebly.com/uploads/1/3/5/3/135315173/5821167.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/jazuravazaguz/basokazarore.pdf
    • https://s3.amazonaws.com/fixararololu/5th_grade_math_elapsed_time_worksheets.pdf
    • https://s3.amazonaws.com/wujapu/zegavibizajonigosaz.pdf
    • http://kamabutexukawiv.rf.gd/bushnell_velocity_speed_gun_user_manual.pdf
    • https://s3.amazonaws.com/vigevot/concrete_mix_design_books_free_download.pdf
    • http://vekagurose.rf.gd/dailymotion_video_er_online_hd.pdf
    • https://s3.amazonaws.com/xuzed/22512581747.pdf
    • https://s3.amazonaws.com/zebarufuridorur/48575513298.pdf
    • https://s3.amazonaws.com/wofaxil/donelobulidorufuwen.pdf
    • https://s3.amazonaws.com/fasudikek/srs_template_ieee_format.pdf
    • https://s3.amazonaws.com/zunaporam/idsa_pneumonia_guidelines_pediatric.pdf
    • https://s3.amazonaws.com/rafiralexezol/gorurev.pdf
    • https://s3.amazonaws.com/bubeto/19700178977.pdf
    • https://s3.amazonaws.com/bejokazemur/focus_imaging_online_report_password.pdf
    • https://s3.amazonaws.com/wogikokuzotaxa/80379987511.pdf
    • https://s3.amazonaws.com/pirofopafu/top_games_for_android_in_the_world.pdf
    • https://s3.amazonaws.com/tanapilamaxi/budubobikedatow.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1c5.bin
cd060984ecf388e708bb91a155851bccc70e33185b45d28f17eb315d60d5b42e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C5 5060 bytes
font_01_sfnt_off000102fb.bin
0893d82f4684e56259f1fbd3fe3412123d3c8e74ab3861eca416137b0aeb456b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102FB 10496 bytes
font_02_sfnt_off000126fd.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126FD 4324 bytes

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