Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c94f7e91a738ea9…

MALICIOUS

PDF

79.2 KB Created: 2021-05-18 15:51:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: db581214b13123bccb262bc137bbeebc SHA-1: e3782c6723cb2d6776728a30b2b5c7969c9588d5 SHA-256: 8c94f7e91a738ea99319f31b73729b3170398a9412271c046941534f65a4bac6
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 0.9993

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://baarspo.ru/strik?utm_term=lee+county+iowa+sheriff+reports PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423189/normal_606a040abb228.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459035/normal_5fe5d5612a38a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413120/normal_5feb18b1717cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424982/normal_603d20377c098.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410217/normal_5fef100d9922f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422894/normal_5fec13dc9241e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380083/normal_5fcd3e73e4887.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479705/normal_606c181d0cd5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417670/normal_6056f0f58ddf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426697/normal_60517756cec57.pdfIn PDF document text
    • http://rigalanolupibe.22web.org/how_to_run_a_successful_liquor_store_business.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500679/normal_6025ff5482444.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486201/normal_5fd2f43e55304.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413473/normal_5fce778132451.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kedokonox.rf.gd/california_golden_bears_football_injury_report.pdfIn PDF document text
    • http://bozawozu.epizy.com/tatunijepovowifu.pdfIn PDF document text
    • http://saninov.epizy.com/athenian_education.pdfIn PDF document text
    • http://gabatotudam.rf.gd/56001723496.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/simplicius_on_aristotle_physics.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/66231552910.pdfIn PDF document text
    • http://banigigafizaje.epizy.com/dimensional_analysis_worksheet_1_conversion_practice_answers.pdfIn PDF document text
    • http://kaguwetu.epizy.com/synonyms_and_antonyms_worksheet_grade_6.pdfIn PDF document text
    • http://vanabigura.rf.gd/60845556509.pdfIn PDF document text
    • http://paritoxo.rf.gd/apple_store_on_ipad.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_off0000f1cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CD 5204 bytes
SHA-256: 458762815d1145542e7df131727a7f3c51d4587fdf96ed4035617598ccd995ce
font_01_sfnt_off0001039f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039F 13928 bytes
SHA-256: c37d9205ebc16350391e7281286ae5439d8b50544c59d45bb132f6bba6c20976

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