Malicious PDF — malware analysis report

Static analysis result for SHA-256 27df836b581323b9…

MALICIOUS

PDF

81.1 KB Created: 2021-02-27 18:12:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2810ae18f95244aca6f4600547e28034 SHA-1: ab9329007ee170d8395f4d9a9fb9eb87dd02dd39 SHA-256: 27df836b581323b9f854f01640ae51c75b8b3c2312febc9a4dd22ce2fbb2fbec
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search query, likely intended to trick the user into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest it functions as a downloader or redirector for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/award?keyword=does+aldi+sell+gluten+free+food PDF link annotation
    • https://cdn.sqhk.co/lunosupi/gy9D4d3/272600665.pdfIn PDF document text
    • https://cdn.sqhk.co/tofegejij/bThjcXF/ice_princess_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/3sbrajh/73944110669.pdfIn PDF document text
    • https://cdn.sqhk.co/jenexovu/jhzTigT/color_switch_happy_wheels.pdfIn PDF document text
    • https://cdn.sqhk.co/sapugelezuf/hggfVNF/nakagavizijed.pdfIn PDF document text
    • https://cdn.sqhk.co/wubofuse/cYrqGwP/xamovotegodeperufapu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383573/normal_6035a8fc1ee7c.pdfIn PDF document text
    • https://cdn.sqhk.co/xazakamugi/fIii8hf/80596533855.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/gh8dYVB/metal_slug_7_arcade_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/icBjihh/impossible_euro_train_simulator_free_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/yhasvBf/nuzijevawefaxad.pdfIn PDF document text
    • https://cdn.sqhk.co/volakase/ge1jjzg/major_mayhem_2_hack_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/zexoribuj/he9Ppja/ragdoll_simulator_roblox_codes.pdfIn PDF document text
    • https://cdn.sqhk.co/fubafonu/B8yhaih/39126569552.pdfIn PDF document text
    • https://cdn.sqhk.co/xaripisi/iajhgeK/kukiweka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493266/normal_5fcd8991e195c.pdfIn PDF document text
    • https://cdn.sqhk.co/vejuwipem/LWjghIV/kiwuk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393208/normal_5fe59361bfb46.pdfIn PDF document text
    • https://cdn.sqhk.co/fubafonu/jb3hj4r/45830211760.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fogibi/priority_health_medicare_advantage_prior_authorization_form.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F9 4956 bytes
SHA-256: a9f5ae2e1c96da99aaca49e95b1acb6d9da8a2644cea1333f56f52b503d3f15e
font_01_sfnt_off000104e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E4 10532 bytes
SHA-256: bc19c214430eb81666f8101fd987a8e9a3ef23c7cea94144abd4bcec23688a38
font_02_sfnt_off000128f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F6 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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