Malicious PDF — malware analysis report

Static analysis result for SHA-256 3961e2f5f6b0abbe…

MALICIOUS

PDF

73.4 KB Created: 2021-03-10 23:05:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5930c0f30c9d41bd7de5d9d6ef5552a2 SHA-1: 545ef8816d5c0bdf200845fa9f438b2623fc2fa9 SHA-256: 3961e2f5f6b0abbe465eebd87415762228647d405f06a45c0291e21a995c1272
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 suspicious domains, indicating it functions as a link farm. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDFs designed to lure users to external sites.

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://bologen.ru/award?keyword=area+sales+manager+job+description+pdf PDF link annotation
    • http://datingsexchat.site/74341050422m4gx1.pdfIn PDF document text
    • http://ighelperscenter.com/titezexatorapilan4pe9x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469106/normal_5fcf9b2872c29.pdfIn PDF document text
    • http://bonus332.site/boswellia_serrata_reviewfwbj2.pdfIn PDF document text
    • http://lovepositions.info/after_school_program_lesson_plan_format70r0b.pdfIn PDF document text
    • http://detonic-hypertonie.website/windows_xp_iso_file_download_for_android4j8ca.pdfIn PDF document text
    • http://b0xberry.online/animal_farm_book_summary_chapter_by_chaptersr36t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391308/normal_5ff512917a674.pdfIn PDF document text
    • http://pasetbs.xyz/36151250542mr665.pdfIn PDF document text
    • http://thehensleys.org/25292159167y5znf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455180/normal_5fedc33ec740d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449984/normal_5ff7a9f062d70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489409/normal_5fc7fe96613ea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5652264c-b98c-46c6-b997-be829a5d4f7a/kitibebet.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/baganiya_dj_song.pdfIn PDF document text
    • https://203aa715-7352-46b1-b16b-5d0aeeaa27a2.filesusr.com/ugd/0582e0_01f603ee8ac2423ab6dcb29421875b71.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/benenupituni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4cc2e6e-e1be-4024-8af4-fbfbde026912/huffy_44_composite_portable_basketball_system_manual.pdfIn PDF document text
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_7380551d2ba34616a69c9c1d8b47202e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/xidanatesegosavenexebi.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/fimop.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_off0000e18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18F 5680 bytes
SHA-256: 8966455b5aca6d302ddf1cb69f4af109f3164a651c9d588d4de55f5230d8822f
font_01_sfnt_off0000f4d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D4 10380 bytes
SHA-256: aa1d19429752392050f48750373e0f7c9f2baf280d31f5e6439a3ba1284ae23a

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