Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d5ed5d48dd3ea4b…

MALICIOUS

PDF

97.3 KB Created: 2021-03-15 16:11:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: cb821544d0f119145e56899252007967 SHA-1: 30cd5f30702ab0fad89cdfaa214da993ea21ef5b SHA-256: 0d5ed5d48dd3ea4bce5cb6c2921ddf91fd5a9e56a16a03bf7be16bbbc1aab3c6
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a link farm. One of the primary URLs, fokemale.ru, is associated with search engine optimization tactics. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or SEO manipulation. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://fokemale.ru/award?keyword=abacus+maths+books+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/xexisini/Biifbja/33312186118.pdfIn PDF document text
    • https://lurotafimeka.weebly.com/uploads/1/3/0/7/130740015/7034398.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372960/normal_603b7d18d428d.pdfIn PDF document text
    • https://notaxivarem.weebly.com/uploads/1/3/4/6/134633458/ac949d641c4a4.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/Ggidscb/mindset_quotes_fitness.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455914/normal_6040f2c1691c1.pdfIn PDF document text
    • http://setopin.mypressonline.com/segebugases.pdfIn PDF document text
    • https://tijikazi.weebly.com/uploads/1/3/4/3/134373218/buluruvuzuwavasezuwo.pdfIn PDF document text
    • http://levotavo.scienceontheweb.net/wpf_tutorial_kudvenkat.pdfIn PDF document text
    • https://jimivisimobud.weebly.com/uploads/1/3/4/9/134901817/fubudusu_jogikaded_xugoven_xitovob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414336/normal_604503919f7e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_60146e3143f42.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/cFjijb0/project_mutant_zombie_apocalypse_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/sisagoku/7haz6hh/math_test_no_calculator_section_4_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/12dd984b-88fe-4810-976e-1f5e5a27f6a7/heil_hvac_dealers_near_me.pdfIn PDF document text
    • https://cd489911-dc6d-4439-b408-84622343fb93.filesusr.com/ugd/d8e941_290e3b77287a4af4a6f036fba9d052f6.pdf?index=trueIn PDF document text
    • https://7e70056c-c2aa-4e53-98c5-50750123c107.filesusr.com/ugd/f8ae5d_e6689598b33d474694a0173f9f421536.pdf?index=trueIn PDF document text
    • https://23da7c74-6e14-424a-b22a-901aa35eafb1.filesusr.com/ugd/9cc572_6954c86500334ec3a38095a6abfb4a52.pdf?index=trueIn PDF document text
    • https://1bf92926-22d0-44a1-94fb-b51843c41cd5.filesusr.com/ugd/762c1a_081847fad5344975b017d46e151af85a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca0120c5-6b54-4b77-aa47-cfb888e2146e/sefepebonotanodiro.pdfIn PDF document text
    • http://nibizuladode.onlinewebshop.net/dowedokojoparuroxig.pdfIn PDF document text
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_4a80000d64724f1fa77d4479d25b36e2.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E52 5512 bytes
SHA-256: d468c31b674e00d2bf64649ed022344a4ec2abe027cb1d1f9a05e803740657e5
font_01_sfnt_off000140e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140E9 12248 bytes
SHA-256: f35544ad52da9d376f9b95502dcd8689c2eea82dde2177efd9c7f9379401d073
font_02_sfnt_off000169b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169B0 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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