Malicious PDF — malware analysis report

Static analysis result for SHA-256 2501acd46edf8da3…

MALICIOUS

PDF

70.7 KB Created: 2021-03-02 19:42:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: f4b899354f9141fc43d403be25c1f6e3 SHA-1: e07aaee6d9baab11ffc9ebb8238ab210a837287b SHA-256: 2501acd46edf8da39d80d8d7325b0810345e48abc247976e1518a033da71d842
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically referencing 'how to reset my insinkerator', suggesting a lure for credential harvesting or a scam. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

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://pelibifir.ru/award?keyword=how+to+reset+my+insinkerator PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4449627/normal_5ff75ebc59c6b.pdfIn PDF document text
    • http://neuroncraft.online/68777308114cli3i.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/HaQjaif/best_camera_app_for_android_free_download.pdfIn PDF document text
    • http://zpitanie.ru/898094814753tg1b.pdfIn PDF document text
    • https://cdn.sqhk.co/getabemuto/eF9jeKG/police_chase_today_nj.pdfIn PDF document text
    • https://cdn.sqhk.co/torazanopuni/hgm8pjj/6074714673.pdfIn PDF document text
    • http://neojust.ru/simple_painting_ideas_for_beginners_on_paper5rs56.pdfIn PDF document text
    • http://manaxupupili.iblogger.org/sample_agenda_and_minutes_templates.pdfIn PDF document text
    • http://vobalemujumojak.mywebcommunity.org/fourier_analysis_on_groups.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/agrahara_ran_application_form.pdfIn PDF document text
    • http://begalokatixatu.epizy.com/rijupanatuwujireke.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_off0000da8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8A 5016 bytes
SHA-256: ae56f02cd2b8a975c9209c0c980f4bbd952efe6fb387f45f157f7597e2e99854
font_01_sfnt_off0000eb95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB95 10184 bytes
SHA-256: d0f76fde84752b0022b7fa5d9835548196f32922f81c5f0d4ee9951d5a1d197b

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