Malicious PDF — malware analysis report

Static analysis result for SHA-256 3af46d2037a2c0e9…

MALICIOUS

PDF

98.8 KB Created: 2021-03-22 18:26:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8904a7a1ecab5df4ae0bb272d982882f SHA-1: 5d3c8eb06c098712dff25c56c4b6c559c3f50ee3 SHA-256: 3af46d2037a2c0e9ec8738d2a212b6e14158356186322a2d5ad81640bfe6be2e
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://crophysi.ru/strik?utm_term=baixar+livro+espiritas+em+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4461229/normal_6048c31d9465e.pdfIn PDF document text
    • https://cdn.sqhk.co/sopofudefif/eZ7OBjj/323498923.pdfIn PDF document text
    • http://wide-do.top/the_norton_anthology_of_drama_third_edition_vol._1th71c.pdfIn PDF document text
    • https://cdn.sqhk.co/wasuxuletiz/jjicgh4/majnu_naa_songs_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449618/normal_5fe5abb4a078b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_6037d099848e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495269/normal_60129e6bab4f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372073/normal_60325af1053c1.pdfIn PDF document text
    • http://pasendapp.online/lockpicking_guide_tbca9cc6.pdfIn PDF document text
    • https://cdn.sqhk.co/sufarosorov/1EcwHij/2437865516.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/hejaSGD/wetolelojovenetikiw.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
    • http://nivosifif.rf.gd/everlasting_love_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd90ab71-73e0-4f19-83e2-2acd86067ce6/elevator_pitch_ppt_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a03502f-d2a0-4e2c-9e64-7f5d0ccfaddb/essentials_of_statistics_for_business_and_economics_7th_edition_solutions_manual.pdfIn PDF document text
    • http://bilunijo.epizy.com/aldehydes_and_ketones_worksheet.pdfIn PDF document text
    • http://tuwigugu.rf.gd/doviwizewi.pdfIn PDF document text
    • http://kegunujav.epizy.com/bowling_performance_in_world_cup_2019.pdfIn PDF document text
    • http://nefigubisi.epizy.com/rizadisovufuvuxifitoxebi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000132d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D4 5044 bytes
SHA-256: 433ea22e5c4ddd4e8da23c2a5a5e6e5d8e7a23d23ed3b46724f30062c17c16c0
font_01_sfnt_off00014406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14406 14388 bytes
SHA-256: 2319398f07c920db45c9031f6565b8287641235ae599596c0ef4ad7c2004d1fb
font_02_sfnt_off00016e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E53 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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