Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cc3bc4a70106d29…

MALICIOUS

PDF

68.7 KB Created: 2020-11-16 21:03:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cc97f335ddc6315fd1533aed11af142b SHA-1: cf177e0d12cff1c8d9103ba32eb324ed9c5acdc7 SHA-256: 8cc3bc4a70106d2906c6e7935f260ec434025cea76e9c47972c331af2fab4bb3
126 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains multiple embedded URLs, one of which, 'https://traffset.ru/123?utm_term=kickasstorrents+apk+free+download+for+windows+7', appears to be a lure for downloading software. The document body, though partially corrupted, suggests a deceptive pretext related to software downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://traffset.ru/123?utm_term=kickasstorrents+apk+free+download+for+windows+7 PDF link annotation
    • https://nurituxokel.weebly.com/uploads/1/3/4/8/134849265/nafida.pdfIn PDF document text
    • https://xukutejupu.weebly.com/uploads/1/3/4/4/134487517/dojud-pafake-pezivok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419836/normal_5f97e220b6a08.pdfIn PDF document text
    • https://lavigumujow.weebly.com/uploads/1/3/4/4/134438710/0649794354e.pdfIn PDF document text
    • https://jobipidamefoji.weebly.com/uploads/1/3/4/6/134696246/gukagumosaboj.pdfIn PDF document text
    • https://rutaluxunenore.weebly.com/uploads/1/3/0/7/130740368/6536950.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d5ddc06-9f81-4cbf-80bf-13c49abce8bd/fallout_new_vegas_honest_hearts_completionist_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/vista_del_campo_norte_parking.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/33101249487.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d99e93f0-11d9-47a6-9aa1-48c233967aeb/bloom_and_lahey_model.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/joroti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b71dd6f-c6f0-450c-b2e0-7102b97f8104/7_dias_para_cambiar_tu_vida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82ed3786-2efe-48f6-ae3b-57ba3f200e68/wizon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2aa4511-67fd-4591-83a4-b97204c4c9df/letra_en_ingles_y_espaol_de_don.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/31976408593.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_off0000d10b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD10B 5352 bytes
SHA-256: a8938ebf8b0c4fe4be0a87540dff9f210482e8abb84217441048cba9bdddd875
font_01_sfnt_off0000e36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36E 9928 bytes
SHA-256: b8f0ac5f54cb61303bf10d35785b5101a83e1415299576a60cb25fc7d9d8496a

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