Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe6ee743fea5bc2…

MALICIOUS

PDF

79.8 KB Created: 2021-03-15 15:54:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b8df4f9424066cde82f47f067ebf46d3 SHA-1: 164b5744ec8d073f6cdc44abb812158a0f87676d SHA-256: abe6ee743fea5bc2237ebb6771f54b1083abda38e922bff207d59b01cbc32710
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://midufefew.ru/award?keyword=companion+planting+chart+pdf+uk PDF link annotation
    • http://frontglass.xyz/advent_of_ascension_progress_guide7tusm.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/51443793546.pdfIn PDF document text
    • http://buytoday.cc/93765457684ou0jq.pdfIn PDF document text
    • http://bestunew.xyz/16379171670z9qxh.pdfIn PDF document text
    • http://bionatur.space/jirefikevawake072ot.pdfIn PDF document text
    • https://vidiguwases.weebly.com/uploads/1/3/4/3/134347373/9969579.pdfIn PDF document text
    • http://wegaturagifo.getenjoyment.net/normal_air_fuel_ratio_sensor_readings.pdfIn PDF document text
    • http://nominasacra.ru/616062236949ytub.pdfIn PDF document text
    • http://vozuzutiwajuzip.getenjoyment.net/50191832905.pdfIn PDF document text
    • http://hotsales-com.xyz/the_abundance_code_bookoior2.pdfIn PDF document text
    • http://galoomer.online/lutotixumomurugoadm5r.pdfIn PDF document text
    • http://hiziryigit.online/c_l_s_ka_full_formhomxo.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/viloposawukorubisimota.pdfIn PDF document text
    • https://wilowukodol.weebly.com/uploads/1/3/4/8/134881933/bexusolifogus.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/xuzed/12922453661.pdfIn PDF document text
    • http://dojorunubi.myartsonline.com/pajumanar.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/1._gametes_are_formed_by_brainly.pdfIn PDF document text
    • http://zorikeroz.onlinewebshop.net/86054594285.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE576 5360 bytes
SHA-256: e6ed8ecf4901f7699e911a14ab72bdf43da41b1693b83461d94a68d9f9d6102c
font_01_sfnt_off0000f77f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77F 10732 bytes
SHA-256: 0384dc08b59c6a2e1d9821079b907e06d488544a8bc6d86b64aa7f96b495fa2c
font_02_sfnt_off00011c89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C89 16344 bytes
SHA-256: 9c47a8ecf7103172530608de19fa11afb8a035ab51042e9cb8c6809f09ebb189

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