Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ab88f4c1e3f22ea…

MALICIOUS

PDF

84.9 KB Created: 2021-02-19 00:51:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f37552fff52b7cc8283a1fd6b6e91bad SHA-1: b7578936f5ec4d577f0a53601f0785acb03ba3bd SHA-256: 9ab88f4c1e3f22eaf0822ec12da8fe0e66975eb13e17c694739c9bdba408139e
226 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of suspicious URLs like http://com-login8.xyz/irumudi_kattu_sabarimalaikku_tamiluz61l.pdf and the overall structure point towards an attempt to redirect users to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://bologen.ru/wix?keyword=rotisserie+oven+walmart PDF link annotation
    • https://xuzopodoker.weebly.com/uploads/1/3/0/7/130738955/nurulorod_povekofexi_wowikekasasarup.pdfIn PDF document text
    • http://fotonagosuslugi-01.space/985018119773up4n.pdfIn PDF document text
    • http://com-login8.xyz/irumudi_kattu_sabarimalaikku_tamiluz61l.pdfIn PDF document text
    • https://buwolerujagelav.weebly.com/uploads/1/3/4/5/134580081/6742407.pdfIn PDF document text
    • https://zixijatujomalul.weebly.com/uploads/1/3/5/9/135962278/5502768.pdfIn PDF document text
    • http://verifedform.com/finding_main_idea_and_supporting_details_exercises7138l.pdfIn PDF document text
    • https://funofumid.weebly.com/uploads/1/3/4/8/134886651/399226.pdfIn PDF document text
    • https://mefosenide.weebly.com/uploads/1/3/4/7/134715399/31ce12d.pdfIn PDF document text
    • https://kurakozizuvev.weebly.com/uploads/1/3/2/6/132681999/a9a3f910.pdfIn PDF document text
    • http://timurberg.ru/wassce_chemistry_past_questions_and_answersha1oy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393762/normal_5fec31d4c7f4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403806/normal_5fdc49548696c.pdfIn PDF document text
    • http://afracheat6.xyz/28364783214d89hy.pdfIn PDF document text
    • http://startbastar.online/notowezunojkvy7m.pdfIn PDF document text
    • https://vudolizozirotor.weebly.com/uploads/1/3/2/8/132815306/fa880cac2f526.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413347/normal_600b6a768936e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401691/normal_6026e1ea1ef2b.pdfIn PDF document text
    • http://vulgargirls.fun/aashto_manual_bridge_evaluationxoif5.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/gchcHie/rail_autocad_drawing.pdfIn PDF document text
    • http://sethel.xyz/vexelepugikapawo293gi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF1 4988 bytes
SHA-256: 27c607e1b2d5ae95bde1e0487c8ab5b8746f16e749a0d1045e8aa1e76ef0310e
font_01_sfnt_off000120e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E9 10964 bytes
SHA-256: 7e20a09c29a76b2a5a9ebf565c12ae745ef0e2b532b1ee055762d9996a7648a1