Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3981b327375ce78…

MALICIOUS

PDF

81.4 KB Created: 2021-03-20 17:07:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: def208fd67963cbc4c8084a64e6b6959 SHA-1: 0927b5e6a2567bfd2558e3bf19c80f15a86d8c22 SHA-256: c3981b327375ce787f5f7f5c1b4af142c9fe3259417b2c66309c308270fd049e
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 0.9997

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://mezovuduw.ru/strik?utm_term=rainbow+magic+book+set+big+w PDF link annotation
    • https://cdn.sqhk.co/kavejufa/gtdhdhb/kuginerege.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368760/normal_60540ed571cd4.pdfIn PDF document text
    • http://pemowovamig.iblogger.org/ace_gate_test_series_schedule.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419849/normal_5ff2a7a5b1443.pdfIn PDF document text
    • https://cdn.sqhk.co/jawubibegeba/iigfgcs/10199138174.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499656/normal_6026dad00203b.pdfIn PDF document text
    • https://cdn.sqhk.co/belerudoxej/zAhgRhd/roku_remote_not_working_no_pairing_button.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374957/normal_603419b5688a8.pdfIn PDF document text
    • https://cdn.sqhk.co/renapudovi/n5gdnja/jovozivokapojutufuvifawa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475859/normal_60437a1c8c8f0.pdfIn PDF document text
    • http://kivizam.22web.org/bulinifexitefatux.pdfIn PDF document text
    • https://cdn.sqhk.co/gizukakom/hghie3y/73329711985.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://167c8e7b-8160-49a2-a88e-f26749d647c8.filesusr.com/ugd/1ad47d_65787eb970fd40d5bef2261808b1227c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0292f42-fd77-4a75-81d2-51f0601f75e3/71791174009.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/introduction_of_accomplishment_report_in_english.pdfIn PDF document text
    • http://fujeraxujixu.epizy.com/37940137236.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9304ca85-7069-49f1-a9ee-3e497ff9d3c1/migejigizivos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd1a35e5-b32f-4731-8109-427132ff268b/can_am_spyder_rt_maintenance_schedule.pdfIn PDF document text
    • http://kewivifonawati.epizy.com/android_studio_auto_delete_import.pdfIn PDF document text
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_d98846294c7647319a9a6ecd95f23fc7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/voropa/vofipivulijemiji.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_off000101bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BB 5296 bytes
SHA-256: 8993b99ff611aa9d74613ed05c71d74b358a6a5a39cb4c5c8821280fa1d6ebb9
font_01_sfnt_off000113d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D2 10664 bytes
SHA-256: 96ff25aca8b4bd917274325b3c1e1c1e3025dc97918f8feb13e7c609d59ed398

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