Malicious PDF — malware analysis report

Static analysis result for SHA-256 679f363edfbeaf8c…

MALICIOUS

PDF

67.1 KB Created: 2020-11-25 13:48:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 272faab38a7217040e1b5cc47d6e5fb8 SHA-1: 0760c32412581f066dde7c3de000949805c5134d SHA-256: 679f363edfbeaf8c826fd134d41050fefc10e937fa529fd135b09eb24a5d6921
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that redirects to a suspicious domain, likely as part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text suggesting it's a lure related to a popular TV show to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/strik?utm_term=john+oliver+season+6+episode+17
    • https://xemilesexevig.weebly.com/uploads/1/3/4/2/134266110/962127d9c5789f4.pdf
    • https://xizuxukavawot.weebly.com/uploads/1/3/4/3/134376570/9740160.pdf
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/vifawudese.pdf
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/wivugome-dirixajev.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/dedc28f3-30c3-4200-b9ac-9061c80ac3ad/10207896609.pdf
    • https://s3.amazonaws.com/tetazino/fiba_basketball_rules_2018.pdf
    • https://s3.amazonaws.com/wizedumi/97054200851.pdf
    • https://s3.amazonaws.com/muvojugejoxip/kentucky_state_police_communications.pdf
    • https://s3.amazonaws.com/regufojalojaza/vehicle_condition_checklist.pdf
    • https://uploads.strikinglycdn.com/files/99093621-c3f9-4117-91bb-6ee42add8506/datefifolesobosozuma.pdf
    • https://uploads.strikinglycdn.com/files/7603db51-1963-43f9-932b-8d074de259f9/ringing_bell_sound_hp_laptop_system_error.pdf
    • https://uploads.strikinglycdn.com/files/bb3f67bf-11e5-4e6c-8a6a-dec15d7e708e/85552001591.pdf
    • https://s3.amazonaws.com/nijudow/duvetipabidefeziro.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_off0000ca5a.bin
3cdcd31b1e087acdb4ce05d0a80afb54c37ef83add2681ae96922adf271cc419		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA5A 5380 bytes
font_01_sfnt_off0000dcae.bin
56e45278268ab76f863a4376df14536e78a58443a81649d678c537a7a5b4b9d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAE 10288 bytes

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