Malicious PDF — malware analysis report

Static analysis result for SHA-256 d864301699aadb17…

MALICIOUS

PDF

72.5 KB Created: 2021-01-14 00:39:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 39e9a668638c2fc39e11c17bc0a1930c SHA-1: 1d9cd8861fc23a264cd391cb5a196c9a31984eca SHA-256: d864301699aadb17c15983db317f1d6748ed4d4fd2ce947b85ea623dae2a0a9b
184 Risk Score

Malware Insights

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

The PDF contains embedded links pointing to known malicious redirector infrastructure, specifically `https://traffine.ru/123?utm_term=1+gallon+fish+tank+ideas`. The heuristic `PDF_SEO_DISPOSABLE_LINK_FARM` indicates the document is part of a link farm on disposable hosting, suggesting a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

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
  • 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.
  • 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://traffine.ru/123?utm_term=1+gallon+fish+tank+ideas In PDF document text
    • https://site-1173526.mozfiles.com/files/1173526/16371097060.pdfIn PDF document text
    • https://cdn.sqhk.co/tetaxekumipi/icBhjji/xutaxosezavab.pdfIn PDF document text
    • https://site-1166064.mozfiles.com/files/1166064/mubulonipununiluxuxa.pdfIn PDF document text
    • https://cdn.sqhk.co/kupodakojav/otgBijI/33989085030.pdfIn PDF document text
    • https://site-1172367.mozfiles.com/files/1172367/nicolas_cage_net_worth.pdfIn PDF document text
    • https://site-1246225.mozfiles.com/files/1246225/antonyms_worksheets_for_grade_3_with_answers.pdfIn PDF document text
    • https://site-1168339.mozfiles.com/files/1168339/34009283770.pdfIn PDF document text
    • https://site-1166680.mozfiles.com/files/1166680/58659145547.pdfIn PDF document text
    • https://site-1176996.mozfiles.com/files/1176996/91948147991.pdfIn PDF document text
    • https://site-1199973.mozfiles.com/files/1199973/82356797515.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/geraromu/functionalist_theory_of_religion.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/lingvosoft_english-_albanian_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/kh2fm_anti_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_off0000d334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD334 4884 bytes
SHA-256: fb3a5277411cc2604d0fdcb53b19e04d20d628d22d387aa4f8313d6ae8fe10d6
font_01_sfnt_off0000e3d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D0 10212 bytes
SHA-256: 7bfa7223b9472f7bf70da4820007951ba17e6de17dee7e6e2e98101857e57257
font_02_sfnt_off00010696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10696 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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