Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e075c3681b495d7…

MALICIOUS

PDF

77.4 KB Created: 2021-02-22 11:20:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: fee6ea9ad08de1225b80a2cdf57bbcb7 SHA-1: 45c72df4945cd46c3f5f252ecebaa39b95a87f16 SHA-256: 4e075c3681b495d78efca131f9796e5ff25cc3947d746e97a4650cec80026079
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, suggests a lure related to 'Path of Exile' builds, potentially to entice clicks. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of PDF vulnerabilities to execute further malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://crophysi.ru/wix?keyword=path+of+exile+chaos+build+3.7 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_601e044d6f4ad.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/aBChdhY/vipigima.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383582/normal_5fd071aa41bc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488558/normal_5fe940428179b.pdfIn PDF document text
    • https://cdn.sqhk.co/lixejudazeza/Cjgliap/classic_football_heroes_books_collection.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390684/normal_5feb04645e481.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405945/normal_60327b6c6111f.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/bpXpT1j/sejuvesemesa.pdfIn PDF document text
    • http://copyright-securityx.com/1642043170tcgx2.pdfIn PDF document text
    • http://kidunotofonaxiz.22web.org/99771177631.pdfIn PDF document text
    • https://cdn.sqhk.co/mupalewefe/aEH0ghO/68803655578.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407331/normal_6017d0a30f636.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389387/normal_6015cd8912e1f.pdfIn PDF document text
    • http://runivofo.iblogger.org/easy_jazz_piano_songs_sheet_music.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://motozotofo.rf.gd/analog_clock_with_second_hand_widget_android.pdfIn PDF document text
    • http://sabukizazuse.epizy.com/cecchetti_ballet_music.pdfIn PDF document text
    • http://miduzusajaveg.rf.gd/enrique_iglesias_bailamos.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_off0000f1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A0 5500 bytes
SHA-256: c12d3f50ce8ca8ec5d05ae8e443f573952d9f19441e2ba59d192be54a8676d71
font_01_sfnt_off00010469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10469 10544 bytes
SHA-256: 96f3d036ef5f1ed1f0f9989d83d22b7f7c1f85e76c2cfb4da5ae2f734f14c272

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