Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c49d36a6f37ca64…

MALICIOUS

PDF

75.7 KB Created: 2021-06-01 08:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8d97a24a497ea12ca7df07bea47fe6a5 SHA-1: 74649f2c20ff60e6a69d099ab3115054f86916d0 SHA-256: 7c49d36a6f37ca641b6b3e1121b0e82424179cc3366401a5a6c1fbe401332938
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://xezojetit.ru/123?utm_term=video+alfy+saga+bikin+baper PDF link annotation
    • https://zuvagenujak.weebly.com/uploads/1/3/4/4/134454716/8336913.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390638/normal_5fda39a14ab1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416493/normal_604f0e6010f8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405660/normal_6066ba3e3d4e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493578/normal_5fc882438e358.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4391602/normal_60b0086f1e468.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369901/normal_601406f26bc46.pdfIn PDF document text
    • https://defugelunek.weebly.com/uploads/1/3/4/5/134524545/9237791.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529893/normal_5ff65fcc118a2.pdfIn PDF document text
    • https://besuxape.weebly.com/uploads/1/3/4/3/134374749/2555297.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370989/normal_60001b593e414.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kiletejude.pbworks.com/w/file/fetch/144427479/deivangal_ellam_thotre_pogum_mp3_song.pdfIn PDF document text
    • http://masawumel.pbworks.com/w/file/fetch/144420612/waxoj.pdfIn PDF document text
    • http://wefolevemud.pbworks.com/w/file/fetch/144445932/101_okey_plus_ip_ykleme_pepsi.pdfIn PDF document text
    • http://wojipag.pbworks.com/w/file/fetch/144420024/rerelok.pdfIn PDF document text
    • http://kufujibumufa.pbworks.com/f/jandy_pool_heater_owners_manual.pdfIn PDF document text
    • http://lekuzax.pbworks.com/w/file/fetch/144412440/12508558603.pdfIn PDF document text
    • http://vadibun.pbworks.com/w/file/fetch/144442494/malasegofuvob.pdfIn PDF document text
    • http://mikabipi.pbworks.com/f/vofowixofulaguv.pdfIn PDF document text
    • http://nilanom.pbworks.com/f/62152078654.pdfIn PDF document text
    • http://jesababa.pbworks.com/f/nisawa.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_off0000e8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C1 5480 bytes
SHA-256: b2aa50418a0e956c797bd715ff554da1957f29470f14068ca7820c5fae4abaac
font_01_sfnt_off0000fb82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB82 11096 bytes
SHA-256: ebb567e170b0e1f1e3aad20790c81aaf20723bde84965dc4c25f2a347a0f010c

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