Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab0a332994e82b07…

MALICIOUS

PDF

71.9 KB Created: 2021-06-02 18:09:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9308f12fc6cd004098e713eb27dd292c SHA-1: 72569395cd5dc54c12f913e3361ac0972d147157 SHA-256: ab0a332994e82b071d163dad6cfc57e773edb74f3fbe670f90b7b075109785d7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cructi.ru/pbw?utm_term=2011+ford+fiesta+owners+manual+fuses PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368495/normal_603c4ef52625f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460243/normal_603c1a1b361ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502248/normal_5fd0be49c5acb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424036/normal_6014c9609f100.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489441/normal_6056b4c14bbdb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391009/normal_5ffd695c84939.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450347/normal_60344f20631b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sijomirurefi.pbworks.com/f/31032823637.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb72b41d-7f0b-4825-98de-f58d1ab05e0c/firex_smoke_alarm_yellow_wire.pdfIn PDF document text
    • http://tasonupopam.pbworks.com/f/solving_systems_of_equations_by_elimination_kuta_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d740c55-703f-470c-bc02-d6e04bd1e916/what_is_basc_3_test.pdfIn PDF document text
    • http://pagorevet.pbworks.com/f/muscle_building_workout_plan_for_beginners_female.pdfIn PDF document text
    • http://mepijewaj.pbworks.com/f/5_reasons_why_capitalism_is_better_than_socialism.pdfIn PDF document text
    • http://nefusim.pbworks.com/w/file/fetch/144437499/how_to_calculate_electrical_wire_size.pdfIn PDF document text
    • http://vazesuna.pbworks.com/w/file/fetch/144508623/30863007428.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/679b5b0e-00c0-4265-b7fc-39a691f9cb84/mims_drug_handbook_2020.pdfIn PDF document text
    • http://letonepamusi.pbworks.com/w/file/fetch/144465531/negative_exponents_rule_worksheet_answers.pdfIn PDF document text
    • http://gozuwef.pbworks.com/f/le_petit_prince_workbook_answers.pdfIn PDF document text
    • http://pafunanukexe.pbworks.com/f/50618659003.pdfIn PDF document text
    • http://degenazi.pbworks.com/f/24_consonant_sounds_in_english_with_3_examples.pdfIn PDF document text
    • http://mibegenav.pbworks.com/f/zajafonijuri.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_off0000dbf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF0 5376 bytes
SHA-256: 0c6edcb04fc51fe85a104dbe8ed01a7fba05251114a395ab499b14da339a211f
font_01_sfnt_off0000ee3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3A 10460 bytes
SHA-256: 3a8a446b1d4087a47d09f4ca026d5b3c96ce26f876cad1c498ea6b05a6f53cce

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