Malicious PDF — malware analysis report

Static analysis result for SHA-256 e684e5ac9044adb8…

MALICIOUS

PDF

75.9 KB Created: 2021-03-08 21:59:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d7952e138f5115be6c6483e93cbbfe82 SHA-1: 5d82e8e5e66bcf713b7534a21368fcf4c9314e39 SHA-256: e684e5ac9044adb84278633a4cbb7450617118151ccea15d102a3c160a00c446
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URLs and the document body suggest a lure to a potentially malicious website. The PDF structure and embedded content are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/strik?utm_term=the+boundary+between+two+plates+moving+apart+is+called+a+____ PDF link annotation
    • https://solakozejifu.weebly.com/uploads/1/3/5/3/135347449/zukawotaluruw.pdfIn PDF document text
    • http://byt-upak.ru/clinical_microbiology_made_ridiculously_simple_booksmedicosy0iwc.pdfIn PDF document text
    • https://cdn.sqhk.co/fotinegataso/gjibsZO/72317380352.pdfIn PDF document text
    • https://cdn.sqhk.co/boketumejipa/jjXhfhg/homemade_wedding_cake_decoration_ideas.pdfIn PDF document text
    • https://kedaregedowe.weebly.com/uploads/1/3/5/3/135321867/rabifopowexose.pdfIn PDF document text
    • http://8bitbeardsco.com/vesukvo8o1.pdfIn PDF document text
    • https://sidatenut.weebly.com/uploads/1/3/5/3/135349940/1188446.pdfIn PDF document text
    • https://cdn.sqhk.co/pirasemofoge/wef8jdW/electronic_project_box_plastic.pdfIn PDF document text
    • https://setejurisu.weebly.com/uploads/1/3/2/7/132740540/lixefope_guwizixu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://bad3f395-1638-4667-b349-d6f934eeab49.filesusr.com/ugd/ed2d23_0b637d250b974f7cb3ce586faca80230.pdf?index=trueIn PDF document text
    • https://c78ffd2e-fc3d-4272-86ca-968d835fb7ad.filesusr.com/ugd/0f9ef0_bb8bab8f38f04287affbbd5feb7bee69.pdf?index=trueIn PDF document text
    • https://c4bedd8b-a3e9-4aa8-9751-a6fde4035b7e.filesusr.com/ugd/037f08_1082368c46784a9f92089ca8c993a88e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/faxaxos/the_lying_game_season_2_trailer.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/proform_treadmill_belt_centering.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC96 5744 bytes
SHA-256: 5d10714ad6d7d91a3858dae9bed0cf5eedc565bbf370e195d82dc241b3cfada4
font_01_sfnt_off0000f00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00D 10464 bytes
SHA-256: b94bdb98c512fc4b9ac6d2abc05bd964171caed5beca5d06f759a30237f3cfc5
font_02_sfnt_off000113d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D9 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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