Malicious PDF — malware analysis report

Static analysis result for SHA-256 0564056834e91a75…

MALICIOUS

PDF

73.8 KB Created: 2021-04-21 04:24:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5ee5f522b40d931b59406c87159b823e SHA-1: 78287ba3dc7583d669b070d3075e889e4010c0d7 SHA-256: 0564056834e91a75f20d4720529ed4cca709f5ae4e5430c18bf961a7c52aa3a3
126 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The primary external URI, 'https://maypoin.ru/strik?utm_term=how+to+fix+plantar+fasciitis+pain', suggests a phishing or scam attempt disguised as helpful content. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to redirect users to malicious sites, likely as part of a phishing campaign.

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://maypoin.ru/strik?utm_term=how+to+fix+plantar+fasciitis+pain PDF link annotation
    • https://cdn.sqhk.co/zigimovovu/RGwiRN1/paper_plane_planet_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/XhiBZtu/w3schools_js_quiz_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474977/normal_60402c2d102c2.pdfIn PDF document text
    • http://iuts.space/68681206835gs2i4.pdfIn PDF document text
    • https://cdn.sqhk.co/dewozoju/MyakgjG/prodigy_math_game_wiki_crystal_caverns.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401716/normal_5ffe05a81690c.pdfIn PDF document text
    • http://mavpa.fun/cardiopatia_hipertensiva_pulmonar7sw7k.pdfIn PDF document text
    • http://afracheat7.xyz/69397194289c3zql.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406241/normal_6063a6235ac25.pdfIn PDF document text
    • http://wawogofofun.iblogger.org/rexusurazajukexur.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/xetasif/12030311004.pdfIn PDF document text
    • http://kutijizon.epizy.com/vutigezilijabowivun.pdfIn PDF document text
    • http://juxenemijoguku.rf.gd/bojapuvila.pdfIn PDF document text
    • http://winovewivigo.rf.gd/solved_problems_on_multistage_amplifiers.pdfIn PDF document text
    • http://bukaduxanob.epizy.com/nugurawivakutalobopeda.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/sekakukikur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5521e0e1-3fff-45e3-8637-db689cbb9e8f/86286248520.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55c4e507-f1f3-418a-8cde-e43d405716e0/yajur_veda_sandhyavandanam_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41a86118-8196-49e0-895f-4ff0455bf311/19849448410.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/7952019176.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_off0000e3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FF 5128 bytes
SHA-256: d83ad0d1b377bddaf96d1b42dec4d9efa06efd0867417626aed9b9c12194fd8b
font_01_sfnt_off0000f598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF598 10632 bytes
SHA-256: 51adb03122b0dd453cc72369ae094bffd70cf739b9e22019fb3f6835d72fbe17

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