Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe9156a15f0a5db…

MALICIOUS

PDF

79.2 KB Created: 2021-04-07 08:39:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 72c5e70e0b3bcf512bd66e88d8f0df85 SHA-1: b9d0737a3bba9140f5a352edbbe194a76ba71201 SHA-256: abe9156a15f0a5dbd89521b0f303918edc38319a34106c02fc189aa34d7ca088
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The primary URL, 'https://maypoin.ru/wix?keyword=logos+pathos+ethos+worksheet', appears to be a lure for users searching for academic or worksheet content. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=logos+pathos+ethos+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420939/normal_603c37a4b62c3.pdfIn PDF document text
    • http://xuvavarapegu.mywebcommunity.org/researchgate_replace.pdfIn PDF document text
    • http://fufejezonodim.mywebcommunity.org/ganaxanedowizidemogo.pdfIn PDF document text
    • http://fefuzebamag.iblogger.org/nepejigikopigak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369504/normal_6009f86386c65.pdfIn PDF document text
    • http://mibemuxagegija.mywebcommunity.org/49199661969.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489422/normal_6053a63bbedcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419192/normal_6049bb0c786f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393904/normal_5ffe413898a66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414487/normal_601fa50945875.pdfIn PDF document text
    • http://simopuvoramawu.mywebcommunity.org/purpose_in_writing_a_research_paper.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496828/normal_603e841a5c109.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/abramelin_ritual_steps.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459060/normal_605c6cfc217fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383792/normal_604467dd1ecc6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jizokotasaz.rf.gd/87115690880.pdfIn PDF document text
    • http://bimogafokusifav.epizy.com/57048386472.pdfIn PDF document text
    • http://matewedidoxeber.onlinewebshop.net/do_ants_have_antennae.pdfIn PDF document text
    • http://revasaxoz.epizy.com/best_rated_dream_interpretation_book.pdfIn PDF document text
    • http://sonisan.epizy.com/58326829368.pdfIn PDF document text
    • http://xomapagovujux.atwebpages.com/chemistry_formulas_in_telugu.pdfIn PDF document text
    • http://vutogebufuz.myartsonline.com/common_interview_questions_and_answers_for_managers.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_off0000f7eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EB 5148 bytes
SHA-256: 04592e93df38fb846cc48b123b994dc91ce2910a891a83cff2dbc387c820b161
font_01_sfnt_off00010982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10982 10724 bytes
SHA-256: 48fa3eac70dc4570d4f51f8a56641fbad1845adaa2e003548130e8136f6edc38

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