Malicious PDF — malware analysis report

Static analysis result for SHA-256 696e679cea868b95…

MALICIOUS

PDF

78.7 KB Created: 2021-06-06 03:22:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 7b29ca17e082da81c03560db8de2dcef SHA-1: 915d0e580438ff2d5e138e958f67e447ab0a1fb2 SHA-256: 696e679cea868b958da7627feb71caa35d5252b5a1076494fd4bd493a4d4258b
146 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and link farms, indicating a phishing or spam distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites. While no scripts were extracted, the PDF structure and embedded URIs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pistant.ru/pbw?utm_term=folic+acid+fruits+and+vegetables+list+in+tamil PDF link annotation
    • https://pabimoju.weebly.com/uploads/1/3/3/9/133997489/7360642.pdfIn PDF document text
    • https://wixetaduzem.weebly.com/uploads/1/3/4/4/134471786/6495869.pdfIn PDF document text
    • https://xanilavobug.weebly.com/uploads/1/3/5/9/135959945/wivalabu_bebezasavoj_dokukos.pdfIn PDF document text
    • https://niduzipotobumam.weebly.com/uploads/1/3/6/0/136054567/noliz.pdfIn PDF document text
    • https://nefalitarula.weebly.com/uploads/1/3/4/3/134308949/fenuwisumeju-xepijigesefifog.pdfIn PDF document text
    • https://moginirem.weebly.com/uploads/1/3/4/7/134769545/9058a6477e.pdfIn PDF document text
    • https://zobatovegu.weebly.com/uploads/1/3/0/8/130873738/7382791.pdfIn PDF document text
    • https://vuxisiso.weebly.com/uploads/1/3/5/3/135321279/6670646.pdfIn PDF document text
    • https://bidubemawekewar.weebly.com/uploads/1/3/0/8/130815124/8a3b686.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bezawagiga.pbworks.com/w/file/fetch/144539691/how_to_set_armitron_all_sport_watch.pdfIn PDF document text
    • http://pazimonofe.pbworks.com/f/what_does_birthmark_mean_in_french.pdfIn PDF document text
    • http://mumubib.pbworks.com/w/file/fetch/144413322/cambridge_first_certificate_in_english_3_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a7b4d75-3dac-4057-8167-ed98f5a3f430/ap_seminar_irr_topics.pdfIn PDF document text
    • http://memofemovo.pbworks.com/f/genetics_basics_worksheet_2000.pdfIn PDF document text
    • http://lerepaxa.pbworks.com/f/textbook_of_microbiology_for_dental_students_free_download.pdfIn PDF document text
    • http://poforezufovu.pbworks.com/w/file/fetch/144693060/lidurawegaridoze.pdfIn PDF document text
    • http://nidibewuzi.pbworks.com/f/65504159718.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03b962a5-359e-4498-9c06-edacc8eb423c/sebosegakogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9caf935a-b414-40fa-8647-59a6243eff95/21283401248.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdd656e0-f929-4c47-a69d-efd8bb5e2e1d/nusulemadubavakotupoza.pdfIn PDF document text
    • http://gudikijuruf.pbworks.com/w/file/fetch/144479688/87507121091.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_off0000f488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF488 5496 bytes
SHA-256: 916eacb1f451c26959f9529f9a703152b1b1ebff97581320490bce7bb91257f2
font_01_sfnt_off00010731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10731 11228 bytes
SHA-256: 09e4e99ddfef909cdbfef5c0eb3a9d3897d7485b3a8cd60054ede6ca22ed56e9

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