Malicious PDF — malware analysis report

Static analysis result for SHA-256 e840a0a47dd3fb13…

MALICIOUS

PDF

80.4 KB Created: 2021-03-22 20:47:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0f3de66bfd636375cb761697fae4803a SHA-1: 54aa5e7943559072b6889f90e9552bc248e72897 SHA-256: e840a0a47dd3fb1336f4d19a8d9561af5b37713c431732e4b1d0d5170b16b399
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 0.9998

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=mobile+marketing+strategy+template PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4405650/normal_5ffc2bfabde6a.pdfIn PDF document text
    • https://cdn.sqhk.co/lipisedopila/ids3hdS/rumble_arena_super_smash_legends_hack.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379726/normal_5ffe29d7c2b1e.pdfIn PDF document text
    • http://vumavotanumibuv.iblogger.org/manifesto_anti-_fashion.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500440/normal_60580454d338a.pdfIn PDF document text
    • https://cdn.sqhk.co/nupegefozub/gcXjbZm/roku_premiere_review.pdfIn PDF document text
    • https://cdn.sqhk.co/lokutibu/7XdRuKB/27708202997.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469135/normal_603e94e6f353c.pdfIn PDF document text
    • https://rebageronamit.weebly.com/uploads/1/3/0/7/130775484/8993550.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449974/normal_60238e1e990dd.pdfIn PDF document text
    • http://zizaburixakog.iblogger.org/does_papa_johns_have_whole_wheat_crust.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378170/normal_600a8acb172fb.pdfIn PDF document text
    • https://gomafaned.weebly.com/uploads/1/3/5/2/135296522/2705548.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/gMhgIDx/22_pew_pew_pew_meaning.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380692/normal_60293f383287a.pdfIn PDF document text
    • https://vavozeja.weebly.com/uploads/1/3/5/3/135308761/juxodexijorikerej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://68e1e3d4-268d-49bc-a8aa-b119cb10fea7.filesusr.com/ugd/3ceeb9_d94d0d43a0a643d4918ca459bddc28e8.pdf?index=trueIn PDF document text
    • http://kisolapuri.rf.gd/3566458263.pdfIn PDF document text
    • http://nuvitaros.epizy.com/jikozojodaxawupiravup.pdfIn PDF document text
    • https://7d6e376e-1ee3-4df5-88c1-8d1511d419f8.filesusr.com/ugd/7dd30d_721eed3ec2574fcca1ee63d5430f803c.pdf?index=trueIn 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_off0000fa5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5B 5452 bytes
SHA-256: edbe4b6538ef5a0de36011ba06359b7a6b04e3fa72057bda80e4f26ee3827aaa
font_01_sfnt_off00010cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDC 11036 bytes
SHA-256: 7e77303c2ece95bd37a2a6a53ce089b159b5a0a4099ae08087a03d88276de109

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