Malicious PDF — malware analysis report

Static analysis result for SHA-256 a01a8baaa3f7e119…

MALICIOUS

PDF

72.4 KB Created: 2021-02-22 02:01:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 52f1a07722c5c86de52e899aefe51ce3 SHA-1: 4ba1bd20f997e9fc352b27b10f6991d15f170a75 SHA-256: a01a8baaa3f7e1190f163e6a5b9bb5ce7a6abbb2339faf12d3fdf7853606a2cc
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, masquerading as information about obtaining a street vendor permit, which redirect to malicious infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate a phishing or link-farming campaign. Although no scripts were explicitly extracted, the nature of the embedded links and the ML classifier's high confidence suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

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
  • 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.
  • 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.
  • 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=how+to+get+a+street+vendor+permit+in+nyc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4467019/normal_601b45c4de41a.pdfIn PDF document text
    • https://cdn.sqhk.co/jidevumedure/hjdhajf/55763847764.pdfIn PDF document text
    • https://gavuzolarot.weebly.com/uploads/1/3/4/4/134458525/luxotor.pdfIn PDF document text
    • https://cdn.sqhk.co/zazavoxujub/jbmQiid/missile_defense_command_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499351/normal_5fce98e8c0ce5.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/hjjjiij/zejage.pdfIn PDF document text
    • https://cdn.sqhk.co/kajutizikodu/lhjOJii/global_warming_facts_for_kids.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528876/normal_5fc6cbccd3d26.pdfIn PDF document text
    • https://gikunagab.weebly.com/uploads/1/3/0/7/130738902/nitotumaz.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/642hbih/lenovo_chromebook_s330_specs.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisimak/ig3gijc/turbo_card_atm_withdrawal.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/JjdStha/vuvubiwanalog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458615/normal_5fe8587595512.pdfIn PDF document text
    • https://cdn.sqhk.co/vekepafate/ygi92SG/retroarch_tutorial_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/hbhfgid/777_casino_drive_murphy_nc.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosenijosu/ifyidhg/rolling_sky_new_level_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388040/normal_60076bd701417.pdfIn PDF document text
    • https://niromovikusuzu.weebly.com/uploads/1/3/4/6/134651616/1620765.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolefowi/fgj6tjf/fazalazujo.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/Tjg5kQP/best_tarot_cards_for_love_reading.pdfIn PDF document text
    • https://cdn.sqhk.co/jekefebiba/e4geVD1/cartelera_cinemark_ecuador_guayaquil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dc70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC70 5576 bytes
SHA-256: 38f7a04a1101bc278b118b5ee967e076648c2c3adfac96c24893df6a806cd27f
font_01_sfnt_off0000ef77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF77 10740 bytes
SHA-256: 5c21050903b2e48833851a7ecdb19e4e4bd2f3fcd140cf6a5af371bc5ae2ec22

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