Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af0b3be7886d1ef…

MALICIOUS

PDF

82.3 KB Created: 2021-03-27 15:14:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a73baee88028ab290aba234a2c11fe94 SHA-1: 2172df7a4960326faf9cf521f3ff139cdd2ca47f SHA-256: 4af0b3be7886d1ef5aec0e04f14571cdec3800b7efe5e469f094f1d071f40cd0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/award?keyword=babri+masjid+case+supreme+court+judgement+pdf PDF link annotation
    • http://beliyden.xyz/34731064916j9ljb.pdfIn PDF document text
    • http://xomapometafa.iblogger.org/chlamydia_trachomatis_gpc.pdfIn PDF document text
    • http://sy0n.icu/7707570460y42ti.pdfIn PDF document text
    • http://itsnat.space/21325171749y3m0r.pdfIn PDF document text
    • http://zatoboyvibor.fun/14217535791fen1t.pdfIn PDF document text
    • http://kvrovk.xyz/91609457774r0ii6.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/d0a416e8-f570-42ca-9b29-77feec2d61dd/49643988721.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdbdbc9d-ce58-4a0b-8c0b-b9967692879c/10455618816.pdfIn PDF document text
    • http://pifetipopazemex.rf.gd/satebikavodidalen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84a99065-2442-491c-835f-db6c0d9000c6/12256100080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbc905f6-805c-490c-a3f2-ace05681972b/soleus_air_45_pint_dehumidifier_not_collecting_water.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/tegivoparupikavaxed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75cba689-6c4e-4fc4-bcc9-566c17a9067c/moviwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42bec9d8-7fda-4d97-8c52-c49632ddfa66/stihl_ts400_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/tixezomituwawakofetoba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/890e7b2b-7bbd-4f82-8a70-aaf21d151bc2/36747832539.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/project_based_learning_projects_for_elementary_students.pdfIn PDF document text
    • http://xapulena.epizy.com/zixevezidanepefuximegigo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a16e2c0-b198-4882-8ee1-e5e1f67126fe/how_to_write_a_child_observation_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a3c8dd5-5267-4b94-be0a-f77b141123cf/pit_bike_engines_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7ec04a5-f2c0-43e2-ae57-65e723d37c00/8905254165.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac6f4e5f-47e7-4b39-99d1-fb3a4d998764/iliad_original_text_english.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_off000104d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D6 5708 bytes
SHA-256: 66b67a8f85acbe77186022297ad10c51e93832b0fb2ef8ed6037fb2b8c54c672
font_01_sfnt_off0001182e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182E 10348 bytes
SHA-256: 06f33cd2679163ead8bb960f8863454701ba2f92a8530b32a8ce3cd5860316bf

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