Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a293f508685e345…

MALICIOUS

PDF

74.8 KB Created: 2021-03-05 11:32:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4e062a52b08299277b38b13de5c6f1ed SHA-1: 80aa381fa17401838c9ec6c1ee92a7f477292133 SHA-256: 8a293f508685e345adeeb494b64faa7d21e958bb4a879a60c487984a87e6fad6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest this document's purpose is to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/wix?keyword=a+handbook+of+new+testament+exegesis+pdf PDF link annotation
    • http://evilcheats.fun/2011_ford_crown_victoria_owners_manualm3t6v.pdfIn PDF document text
    • http://devumixik.iblogger.org/what_constitutes_working_class_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480162/normal_5fd750c562064.pdfIn PDF document text
    • http://gazzsheff.xyz/80515449797v0q2.pdfIn PDF document text
    • https://cdn.sqhk.co/fofodafexadu/jdjdpge/65906356467.pdfIn PDF document text
    • http://madokedaxemosu.22web.org/liput.pdfIn PDF document text
    • https://cdn.sqhk.co/gogadibavuta/DYja5lg/vekibavukilurig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465145/normal_6014f5b8e6618.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/jipowirije.pdfIn PDF document text
    • http://menetufebev.22web.org/lessons_learned_excel_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465557/normal_603a994d2da3d.pdfIn PDF document text
    • http://nevoxodaw.66ghz.com/admiral_byrd_diary.pdfIn PDF document text
    • https://cdn.sqhk.co/xiwapusumoge/gjgeaId/24913897468.pdfIn PDF document text
    • http://duxinivodozular.mywebcommunity.org/the_trials_of_apollo_the_dark_prophecy_free.pdfIn PDF document text
    • https://cdn.sqhk.co/ramazunor/MhighXn/93857775188.pdfIn PDF document text
    • http://gepanukotex.getenjoyment.net/17650801536.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465136/normal_5fcc07a3c97e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407102/normal_601e75279c24b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tikisomoxo.epizy.com/75963151798.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/7108635631.pdfIn PDF document text
    • http://natadomemorad.epizy.com/66359345943.pdfIn PDF document text
    • http://fegarezitima.rf.gd/55273998059.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86F 5680 bytes
SHA-256: 3e64c52f26a03f8d1b8f32ac98820f625a4ecc72c2228a19d29248ef4c5ce5ba
font_01_sfnt_off0000fbbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBB 9896 bytes
SHA-256: 8f11c54284a50e3e5f0d1cc734fc66f40380182809d538e3b65bd086663969d1

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