Malicious PDF — malware analysis report

Static analysis result for SHA-256 6162ed7670e417dd…

MALICIOUS

PDF

77.9 KB Created: 2021-02-25 17:07:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f0ebfbbbf984d66c75a1b7e9fb1b63af SHA-1: 0d9959046ffe2e2a2d986b54ff8de8ff71a9217d SHA-256: 6162ed7670e417dd109246cb4d854983258ab0c35f3f8c60e450f746b95b28fe
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, many pointing to disposable hosting services, and one specifically linked to a 'certified iso/iec 27001 lead auditor' keyword. This pattern is indicative of a phishing or malware distribution campaign, leveraging a seemingly legitimate lure to entice clicks. The ML classifier and ClamAV detection strongly support the malicious nature of this document.

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://jacksth.ru/award?keyword=certified+iso%252Fiec+27001+lead+auditor PDF link annotation
    • https://cdn.sqhk.co/pixafosabow/8f0KN4n/11717138574.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367289/normal_5fec2fe3d3069.pdfIn PDF document text
    • https://zovakobazala.weebly.com/uploads/1/3/1/4/131456363/5851732.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389353/normal_601f34282f76e.pdfIn PDF document text
    • https://cdn.sqhk.co/lodikorep/gh8T3Mh/46373564604.pdfIn PDF document text
    • https://nabaladeso.weebly.com/uploads/1/3/1/4/131438379/vugumojutox-sopatadudor.pdfIn PDF document text
    • https://cdn.sqhk.co/lalusozokigi/Rpl2Tha/home_design_3d_gold_download_gratis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480884/normal_601f157287c58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369343/normal_5fecce37dc9b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446646/normal_600a5d36e377a.pdfIn PDF document text
    • http://tofosasolamet.iblogger.org/gijiwadakuzoxotunejijinod.pdfIn PDF document text
    • https://xuvupidorok.weebly.com/uploads/1/3/1/4/131407629/kofode.pdfIn PDF document text
    • http://jetolad.iblogger.org/isaiah_berlin_books.pdfIn PDF document text
    • https://cdn.sqhk.co/mewivupa/dY6ggjd/maximum_carnage_comic_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457332/normal_60021ec2a715e.pdfIn PDF document text
    • https://fumaletaseker.weebly.com/uploads/1/3/1/3/131381433/5058217.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://kexeban.rf.gd/south_america_map_printable.pdfIn PDF document text
    • http://pufaxutunipoja.epizy.com/39132155892.pdfIn PDF document text
    • http://pilidiju.rf.gd/91345286816.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_off0000e6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C3 5256 bytes
SHA-256: 008b208c213b4a1e94f7dc8c3bc761a4c17edcc460405757da9b95e3eeb79d3e
font_01_sfnt_off0000f8ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CE 10408 bytes
SHA-256: 5af133558b021d8450a4ca791c6ce00f1a01ff27230fb7858495da621009f562
font_02_sfnt_off00011c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C70 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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