Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1cc56bc29e38c06…

MALICIOUS

PDF

74.0 KB Created: 2021-03-18 06:46:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 34b7c460bf79b18e89cc1fc378d47648 SHA-1: dd2a0064cfc586ef0755b971a9e911070d775648 SHA-256: f1cc56bc29e38c06f89e81d1828e48b86284e9f921bc785d2506c9355f74def2
186 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 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 0.9999

Heuristics 6

  • 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 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.
  • 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://soxebez.ru/wix?keyword=external+fragmentation+and+internal+fragmentation PDF link annotation
    • https://cdn.sqhk.co/woselukafo/jSgjjjY/mowezoruwevedoji.pdfIn PDF document text
    • https://cdn.sqhk.co/satukevaguka/hgd4utG/ryan_sutter_ninja_warrior.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/ahbhbhh/goxatazeve.pdfIn PDF document text
    • https://tesujirigagorin.weebly.com/uploads/1/3/4/8/134869290/2159823.pdfIn PDF document text
    • https://rabupipimefife.weebly.com/uploads/1/3/0/8/130874594/5431863.pdfIn PDF document text
    • https://puxupukesif.weebly.com/uploads/1/3/0/8/130813524/ae5fa.pdfIn PDF document text
    • https://wokoxulepimam.weebly.com/uploads/1/3/1/4/131438011/zudobozejope.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/egcjdYE/real_moto_2020_colby_raha.pdfIn PDF document text
    • http://begemot.space/the_hungry_giant_s_shoed4yq3.pdfIn PDF document text
    • https://genezekanoz.weebly.com/uploads/1/3/1/4/131413678/2669456.pdfIn PDF document text
    • http://5dradio.ru/hp_7520_will_not_printxwy3j.pdfIn PDF document text
    • https://nevonanopovew.weebly.com/uploads/1/3/4/3/134335048/2681354.pdfIn PDF document text
    • https://rubavuwo.weebly.com/uploads/1/3/4/4/134403239/8119214.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/wizidimawag/32088344165.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/15429995887.pdfIn PDF document text
    • http://nopawalaxuwaw.onlinewebshop.net/firetatubetufikudejufo.pdfIn PDF document text
    • http://pedamodaw.onlinewebshop.net/how_to_tell_if_caps_lock_is_on_logitech_k350.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/taylormade_r15_430_driver_specs.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F2 5076 bytes
SHA-256: f04c7557ff5f435289c9e550b29d9084868879ea3c5279efe8a876a8ef459a73
font_01_sfnt_off0000f729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF729 10452 bytes
SHA-256: dbbaed2cb7a935ed962039933f45c88074ee4bd46fef1d87cb170448ddfcb1b7

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