Malicious PDF — malware analysis report

Static analysis result for SHA-256 500150ef551ef607…

MALICIOUS

PDF

77.6 KB Created: 2021-03-01 13:03:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 1282c9d8f58003c2607860b91cc83510 SHA-1: 935d5ef15ae542ccc84b67a95425bca58aadcc61 SHA-256: 500150ef551ef607cfa082359a9e65c4a4c994eb620a9e2fab916882d33e07eb
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm hosted on disposable domains, designed to redirect users to malicious content. The embedded URL `https://fokemale.ru/award?keyword=how+to+reset+a+amana+front+load+washer` suggests a phishing or scam lure related to appliance repair. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs strongly suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or malware delivery.

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://fokemale.ru/award?keyword=how+to+reset+a+amana+front+load+washer PDF link annotation
    • https://retowukiri.weebly.com/uploads/1/3/4/5/134592720/bed737.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422373/normal_5fffa45be505c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459060/normal_5fe7082f42ec8.pdfIn PDF document text
    • http://bawimip.sportsontheweb.net/how_to_program_my_hearing_aid.pdfIn PDF document text
    • https://tajolakafu.weebly.com/uploads/1/3/1/4/131454466/surituragudi_taxomutewebexuv.pdfIn PDF document text
    • http://puwexakibo.iblogger.org/30888648646.pdfIn PDF document text
    • https://sodomolu.weebly.com/uploads/1/3/5/3/135398587/6437737.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424361/normal_603c2acdc751f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421218/normal_5fe61b01c670f.pdfIn PDF document text
    • http://tezubimisigej.iblogger.org/infographics_templates_powerpoint_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389823/normal_5fdd7ef764f69.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gadivedu.rf.gd/18591351922.pdfIn PDF document text
    • http://fuvarijes.atwebpages.com/atlas_of_sustainable_development_goals_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/topepadixasebaxifetu.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/entry_level_software_development_jobs_remote.pdfIn PDF document text
    • http://nizowozutagele.atwebpages.com/65433400235.pdfIn PDF document text
    • http://nalejunubotuw.rf.gd/desalosuxigobolemi.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_off0000f0bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BC 5200 bytes
SHA-256: 91111574673c69bdc41982eba03457e7b139ad2352805aad83da2e3c57d56ebe
font_01_sfnt_off0001024b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024B 10916 bytes
SHA-256: aa283fcb6f6f63411576aa6fed536732fbd22666aab3ba150bb13b283b0e1abe

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