Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8b0c3955cbb4e3f…

MALICIOUS

PDF

74.5 KB Created: 2021-02-23 12:13:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0468d310b75402e5855723555e3971a2 SHA-1: 9fe0e8dc28b600c23bfccaa6efe2b604cca86251 SHA-256: b8b0c3955cbb4e3f02dd9510b3a44a88c0a9801093f814fd4828ac76c3bfe217
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/123?utm_term=sony+fs5+mkii+specs In PDF document text
    • https://cdn.sqhk.co/pigevikuwi/ghXQihY/94627743223.pdfIn PDF document text
    • http://fortuneo.best/587357170629c5hc.pdfIn PDF document text
    • https://cdn.sqhk.co/karadirimose/jk23yIY/fofusoligiramib.pdfIn PDF document text
    • http://ueuniti.website/61506678648j8qi4.pdfIn PDF document text
    • http://bupiwasun.iblogger.org/hitman_blood_money_wiki_guide.pdfIn PDF document text
    • http://help-feedback-amzn3.xyz/nadevesakidujuxibepaz4jnwi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/32642360292.pdfIn PDF document text
    • http://fanunif.rf.gd/affliction_warlock_arena_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/ssbjk_admit_card.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/dizajebuluxumevexif.pdfIn PDF document text
    • http://nepupiborama.rf.gd/waxawesagulogepibubitusov.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/lineaire_hypotheek_berekenen_excel_formule.pdfIn PDF document text
    • http://zopiwirikidow.rf.gd/16553435178.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/3d_audio_songs_free_bollywood.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/broiler_chicken_side_effects.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/kukilepagixi.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/air_raid_siren_sound_effect_s.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_off0000e455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE455 5216 bytes
SHA-256: 1bc040c8a9a1f4aa8aebcf848d409278fa581b651f3bbf7681673fd0f7d8e8bb
font_01_sfnt_off0000f62b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62B 11552 bytes
SHA-256: 3e4215bd4f262f7c9bcc36798555188fd56c0f92bb5c48a8e625337f4759c565

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