Malicious PDF — malware analysis report

Static analysis result for SHA-256 5729224d05b70986…

MALICIOUS

PDF

67.1 KB Created: 2020-11-13 12:02:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 034858585c24743d2be1e8caac149119 SHA-1: 1b01b81998a82ef91f9df4f37a57d8f4c876c2a8 SHA-256: 5729224d05b7098637b4867f4b097aa308e4ca5edbecb3786d9b908b40af081b
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It contains an embedded URI pointing to 'trafffi.ru', which is likely a malicious domain used for distributing further payloads or conducting phishing attacks. The document body, though heavily obfuscated, suggests a lure related to an 'FRP ADB tool for Samsung', indicating a social engineering attempt 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=frp+adb+tool+samsung PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374838/normal_5f8ef9a8ae917.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402932/normal_5fabc25457752.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445890/normal_5fa342b058f07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402517/normal_5fad6e33d7646.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/vitanijaxenedujos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0077dc4a-b17f-4374-8696-1287d96635ec/zewuwomaxunitifarapitaf.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/lerubeliwoxidel.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/ordeal_by_cheque_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f3216e8-2962-4093-a783-4fc5b09a059e/prototype_theory_psychology.pdfIn PDF document text
    • https://s3.amazonaws.com/mupakijivuruzim/dragon_ball_z_dokkan_battle_mod_apk_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/groundwater_contamination_in_west_bengal.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/maytag_epic_z_dryer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nujosuwemedadi/bedaxadatamowivazotutelob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68cfc8ba-2d0c-4a1d-b343-f67d15408587/86414169313.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/65787393116.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fbc818f-3ae0-4ae9-b985-9abf6da63908/wusize.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_off0000c7c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C5 5372 bytes
SHA-256: 25c1ca07cee496c053e52d3368b1d88bb39ae7abd9a7112b8184a21872206723
font_01_sfnt_off0000d9f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F0 11312 bytes
SHA-256: 34fe7a13a5ded4597632d026ba6f6e75350549b80a5ca3622c42303a7fc44aab

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