Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae172b5a02fe5525…

MALICIOUS

PDF

78.2 KB Created: 2021-03-03 03:08:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ce8c689a84a78478d2670b91fac68a67 SHA-1: 2a92c5008617b9401f8d741e7738abce01c8a1e4 SHA-256: ae172b5a02fe552559c7337b44133b806740f62479eeab27ff8cec29a5f39b1d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URIs are consistent with a malicious document designed to redirect users to potentially harmful sites.

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://fokemale.ru/strik?utm_term=maisie+dobbs+messenger+of+truth+summary PDF link annotation
    • http://lnstagramoriginal.com/xojonebusufodimeloparedbm1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384472/normal_602150bc5dfc7.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/15082304821.pdfIn PDF document text
    • https://cdn.sqhk.co/kewukapugino/I4bifhi/how_to_get_a_girlfriend_without_online_dating.pdfIn PDF document text
    • http://kvrovk.xyz/getotuxewifimomovg3p0.pdfIn PDF document text
    • https://cdn.sqhk.co/galudubujuwa/hWidgh9/finabonugobofijurevonopex.pdfIn PDF document text
    • http://fovoxarofej.getenjoyment.net/sword_art_online_mobile_game_review.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/17897368050.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476270/normal_5fee9e1709a05.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/BieS2BK/jumanji_2019_trivia_questions.pdfIn PDF document text
    • http://pumba-timon.space/53709110434okyv.pdfIn PDF document text
    • http://ig-copyrighthelpcenter.com/world_of_warships_kancolle_mods9uczy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388181/normal_600669a36d29b.pdfIn PDF document text
    • http://carinsusa.info/dowizowobiwvznyb.pdfIn PDF document text
    • http://wukosemat.22web.org/cabinet_battle_2_worksheet_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/i58ohcI/tiny_dino_world_mod_apk_latest_version.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xologikaju.atwebpages.com/bagiwitidimebov.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_off0000f5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F6 5536 bytes
SHA-256: fa325bfd994dfe5e7c02ca96ca77e30a5f37023f921ca927056bc00582e722e6
font_01_sfnt_off000108b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B1 10172 bytes
SHA-256: 0970ed6cc036bd450123b8c9107d0b7622e7c2e49494c306fcb194f8ef294a86

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