Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed92266b4239df82…

MALICIOUS

PDF

72.2 KB Created: 2021-03-10 23:05:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c0a89de14eea819fcdc100d190609ec1 SHA-1: 092248b5dafe8bcc46eb4190bce93637c72e155d SHA-256: ed92266b4239df8244fec89aa068387fbb44732a62fad66a7e6fa2f02570ab60
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://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://scripts.sil.org/OFLIn PDF document text

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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