Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c70fe8f7d9ad7c…

MALICIOUS

PDF

65.8 KB Created: 2021-02-14 13:05:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c5d2d1bd8eb3b12768c9e7036950da72 SHA-1: ee4c0e4b14c786fe7e86bf99ede77a237ce85223 SHA-256: 01c70fe8f7d9ad7c210d202446faa7e348fecd24a7a79d6f74fd8c7293593b14
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier also indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous URLs points towards a campaign designed to redirect users to potentially malicious or deceptive websites.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/aws?utm_term=california+grapevine+weather+report PDF link annotation
    • http://meblik.su/gun_strike_ops_ww2_apkv4lyw.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/9176382337adrd2.pdfIn PDF document text
    • https://rujafamuzesoka.weebly.com/uploads/1/3/5/3/135339602/fukegegegigiv-magaf-zozitagid-pagelesasumago.pdfIn PDF document text
    • https://pufizemopuvagup.weebly.com/uploads/1/3/1/4/131407511/7813250.pdfIn PDF document text
    • https://wafiludelo.weebly.com/uploads/1/3/1/4/131437380/9638706.pdfIn PDF document text
    • https://lulujazopo.weebly.com/uploads/1/3/4/7/134769354/sewuve-pidur-tapiwupariximot-vupix.pdfIn PDF document text
    • https://vujewixijul.weebly.com/uploads/1/3/1/4/131437312/650100.pdfIn PDF document text
    • https://defelidiko.weebly.com/uploads/1/3/1/0/131070982/975099f13d5ba5.pdfIn PDF document text
    • https://watogovujun.weebly.com/uploads/1/3/4/6/134626060/61de0de44407.pdfIn PDF document text
    • https://pepadamive.weebly.com/uploads/1/3/4/4/134468065/gudulorubimu.pdfIn PDF document text
    • https://duzigolanulemo.weebly.com/uploads/1/3/2/6/132680867/pewekoga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416319/normal_6003392c83725.pdfIn PDF document text
    • https://wugikomopeza.weebly.com/uploads/1/3/1/4/131407005/wokizawofojoduborona.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/simujix/japan_car_auction_sheet_carused_jp.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/79021727166.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/55579581287.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/projek_account_form_5_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/funniest_kid_test_answers_5.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_off0000c6d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D4 5044 bytes
SHA-256: 2124d887625ba4643101aa141e50428d3392fc0d47a04523659b7e9922a1df97
font_01_sfnt_off0000d810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD810 10076 bytes
SHA-256: eee034ebc59cf4954bc673f33ab36fad2eb01c59af327ffbc9ed9f3f7d41d48d

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