Malicious PDF — malware analysis report

Static analysis result for SHA-256 7360919140e641ab…

MALICIOUS

PDF

65.8 KB Created: 2020-11-24 01:22:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d54dfc6a7a3dc52c141e3e58571fc64 SHA-1: 740a832175bad0c8eaf849957347e15b1b66f0f9 SHA-256: 7360919140e641ab3271197fda4086d7bd116907955256f2aeb87db81ba00a0a
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing attempt to redirect the user to a malicious site. The ML classifier and ClamAV detection strongly support this assessment. Although no scripts were explicitly extracted, the PDF structure and embedded URL suggest an attempt to exploit the user's trust to visit a malicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/123?utm_term=directions+to+rocksino
    • https://cdn-cms.f-static.net/uploads/4458394/normal_5fa7f8c4a46ce.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pusori/gofefugibisigar.pdf
    • https://uploads.strikinglycdn.com/files/223e4297-23ec-42b9-b416-41bba4edad51/sadunasevuxiwuraxa.pdf
    • https://s3.amazonaws.com/gowupuzokowuxes/adverb_phrase_worksheet_for_grade_7.pdf
    • https://s3.amazonaws.com/jixerubowi/nulimokusizizejogugibotax.pdf
    • https://s3.amazonaws.com/mekonulegipero/77839463406.pdf
    • https://s3.amazonaws.com/joterige/badass_batman_pictures.pdf
    • https://s3.amazonaws.com/tutapaxi/69626317230.pdf
    • https://uploads.strikinglycdn.com/files/727c5242-c1af-42ee-bdff-65ffa3fd3797/los_agachados_rius.pdf
    • https://s3.amazonaws.com/divexikav/literature_sample_question_answers_igcse.pdf
    • https://s3.amazonaws.com/sevoga/cm_ss13_hotkeys.pdf
    • https://s3.amazonaws.com/pamavon/lurogokavejosug.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc5f.bin
c17f47869b08abc7b6ad59c977c1998bb7afc2ad05f76805e1fbaedeac7b985b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC5F 4616 bytes
font_01_sfnt_off0000dc29.bin
9e44f6f5a26090aa55156ece56f01a2d212a6fe42da700ee7fd2f9b44f647b76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC29 8880 bytes

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