Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e5ab876b1fedbc…

MALICIOUS

PDF

86.7 KB Created: 2021-02-24 23:35:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 134835d839701e49db14eeb32032b08f SHA-1: 0e86a04fbdc4a4a46df3601604fcaa0ddd157482 SHA-256: d0e5ab876b1fedbc2d00d1bb5973b1b98c97cdaf85ab2d0941c51ba551efe4c7
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 of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though partially corrupted, suggests a lure related to search results or informational content, aligning with the observed link farm behavior.

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://leonvi.ru/123?utm_term=how+to+make+a+rounded+corner+triangle+in+photoshop PDF link annotation
    • http://podarokinsta365.site/partition_piano_la_valse_d_amlie_poulain87law.pdfIn PDF document text
    • https://cdn.sqhk.co/xibidodoko/jwjamt5/pawumovipepatok.pdfIn PDF document text
    • https://cdn.sqhk.co/zunesunatiri/gjiehjE/army_prt_standards_chart.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375196/normal_5fe1f9b703d18.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417137/normal_5feeda5041a61.pdfIn PDF document text
    • http://kozlo.space/bestwap_movie_2018_mp42fnlm.pdfIn PDF document text
    • http://rezonansmusic.com/86766878725i8ijf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417995/normal_602b8668e3127.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417824/normal_5ff03ca953756.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470224/normal_5ff31040c7341.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382430/normal_60046ee570151.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485587/normal_602dcc75ee198.pdfIn PDF document text
    • https://cdn.sqhk.co/fegozanodedu/jfbxhj6/60278312911.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496014/normal_5fd67c5dbc1a4.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://gipatoxusopupos.epizy.com/formal_gowns_for_sale_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/piruvirosag.pdfIn PDF document text
    • http://mojofukiw.epizy.com/18179286550.pdfIn PDF document text
    • http://kuwubuvorij.rf.gd/all_the_way_up_westside_remix.pdfIn PDF document text
    • http://kewumexor.epizy.com/todukepusarar.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/widupejokef.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10721 5484 bytes
SHA-256: ec29c26ac2571a4ca1996dd1a44866d9de52e10223583327bed034f036c14822
font_01_sfnt_off000119a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A0 10824 bytes
SHA-256: 52c5e7a5810b9913fde14bd541a9ebfa2db88197a1460ec4be315cc8de1ba8cd
font_02_sfnt_off00013eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EAF 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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