Malicious PDF — malware analysis report

Static analysis result for SHA-256 519c4db8724d4ed5…

MALICIOUS

PDF

86.3 KB Created: 2021-02-13 02:41:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0bd0e770ef5741060d3e225c94569595 SHA-1: 95a50eb1c731b68d27c6f359b0d3be40cc063c86 SHA-256: 519c4db8724d4ed56cf5187c464129a9bd53fb26381acc1b13067e1d6a2c7d57
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://jacksth.ru/wix?keyword=irony+as+a+principle+of+structure+publication+date PDF link annotation
    • https://sikufotoxatufik.weebly.com/uploads/1/3/4/4/134458503/cab88f6.pdfIn PDF document text
    • https://kabijibijeg.weebly.com/uploads/1/3/4/9/134900291/90edf739843f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365542/normal_5ff3099867fc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391634/normal_600ea43a628a8.pdfIn PDF document text
    • https://wudizabilizone.weebly.com/uploads/1/3/4/7/134745746/rewipeginijawelomow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370054/normal_6022fe9d7a697.pdfIn PDF document text
    • https://liwavijej.weebly.com/uploads/1/3/4/3/134379327/e68a862.pdfIn PDF document text
    • http://zizaburixakog.iblogger.org/equine_radiographic_positioning_guide.pdfIn PDF document text
    • http://ita-yog.space/51446062516rvpq9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412382/normal_6001d830b2b40.pdfIn PDF document text
    • https://gatojodegapov.weebly.com/uploads/1/3/1/6/131637656/zudodoz.pdfIn PDF document text
    • http://santaparker.store/macbeth_act_1_scene_7_detailed_analysis62iex.pdfIn PDF document text
    • http://lestyprin.online/billie_eilish_lovely_lyrics_ft._khalid_meaningr3rzo.pdfIn PDF document text
    • https://sisasava.weebly.com/uploads/1/3/0/7/130738988/637468.pdfIn PDF document text
    • http://raftgjgr.space/maplestory_2_epic_quest_guidevhzt6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gojupugifoliru.epizy.com/dipole_antenna_design_using_hfss.pdfIn PDF document text
    • http://bozizivaposenu.epizy.com/60829096813.pdfIn PDF document text
    • http://pijularof.epizy.com/tv_news_broadcast_script_template.pdfIn PDF document text
    • http://fozidunaleral.rf.gd/16041434026.pdfIn PDF document text
    • http://ninovaxabax.epizy.com/barbara_barry_bedding_sheets.pdfIn PDF document text
    • http://roxutudutupit.epizy.com/17999741528.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_off000115bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115BB 5328 bytes
SHA-256: bacd38f49fb7aa05651b20b3b0242613d37a82ba44aa2617fcbdf094bc479674
font_01_sfnt_off000127e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E8 10468 bytes
SHA-256: ad106c044dde1c140b2643c039d29adbab2ad5e40c14f424555c813ccc10b62e

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