Malicious PDF — malware analysis report

Static analysis result for SHA-256 2508d9983cf3c0d6…

MALICIOUS

PDF

61.6 KB Created: 2020-12-17 15:10:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 40b7444fde0029da86261a63c7bd4fd6 SHA-1: 791063ec434fb90e9fb6176d3b6dee659ffe9b0b SHA-256: 2508d9983cf3c0d63d3a8e3c6508ed0639b1e0bed3aaace512b472daec0d90d2
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 as a phishing trojan. It contains an embedded URL pointing to 'trafftec.ru', which is likely used to host or redirect to a malicious payload. The document body, though heavily obfuscated, contains text suggesting a lure related to 'advanced funk studies'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafftec.ru/123?utm_term=advanced+funk+studies+pdf+free PDF link annotation
    • https://bomexufimewaw.weebly.com/uploads/1/3/4/5/134517434/wenobiwigusi-muvesu-jurovawelox.pdfIn PDF document text
    • https://sibemawiwojaro.weebly.com/uploads/1/3/4/8/134887292/wobumogopebu.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/0255def3ca6f2.pdfIn PDF document text
    • https://purigimotefejis.weebly.com/uploads/1/3/4/3/134308192/gipewepar_xepegenet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fced751de407d5e35cae949/t/5fd69c875b1f6f7539e06e40/1607900296407/google_sheet_sumifs_function.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/vapenakorafo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf86461e25426e1fe9e3c/1606285413319/wuxuxezobopavu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f05df9866f3fd2d48fd4/t/5fc57ef51972c46e3c59e412/1606778615126/88887044475.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/990fd86d-de89-4eae-8495-9643043c6007/spotted_tailed_quoll_husbandry_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3612f3ab-9ffb-43a3-a695-c87636f34675/zitupe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc537ae0a2757459bff2ea8/t/5fc700387995075abdd8c7f2/1606877243024/gereriwesevefinebirevu.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/cinema_box_apk_download_for_android.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d4c78139af037644e8c4/t/5fc34691f3de5e49b5cdb4c6/1606633105286/sudaxi.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_off0000b3b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B7 5228 bytes
SHA-256: b06e096367a0d3bd3e9218052610eb918783785519939b3f88badabbe3408743
font_01_sfnt_off0000c5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A0 10576 bytes
SHA-256: 5e00c7377c73e930e17507399d6a54077fef27ad2e67d3410f72ecc8b5e46165

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