Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d424140f81b82d9…

MALICIOUS

PDF

78.7 KB Created: 2021-06-05 10:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 18d26e6ec451b2dfb84feb4535870fd6 SHA-1: 5568ffb9af494f04198b793e3a83d5203a4a2061 SHA-256: 0d424140f81b82d96dca621e157fc2a62d3390ae2a3ea4b8b70fe7580fd99999
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

Heuristics 6

  • 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.
  • 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://nomylo.ru/pbw?utm_term=atl+free+movie+full PDF link annotation
    • https://kujutokisomodu.weebly.com/uploads/1/3/4/6/134662527/8c0e8239f8a20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469106/normal_606b1feb5d09e.pdfIn PDF document text
    • https://jikabokuw.weebly.com/uploads/1/3/4/6/134658058/ronebo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388815/normal_6045f844b3f1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403954/normal_6060c90af1837.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426541/normal_5fd91f5f24a30.pdfIn PDF document text
    • https://ruvezidarumova.weebly.com/uploads/1/3/1/3/131380493/e1d58f5169.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lefilep.pbworks.com/w/file/fetch/144636183/filmyzilla_bollywood_movies_2018_download_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82898007-4bf0-4483-a9a6-0e5c9aa2b6e0/install_chromium_os_on_virtualbox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71232c13-339c-443c-89d5-bf249f30fd23/99005981482.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46625864-e003-417d-83f2-96ac590c1957/how_to_get_itunes_gift_card_codes_for_free.pdfIn PDF document text
    • http://puzavofan.pbworks.com/f/basic_computer_interview_questions_and_answers_for_freshers.pdfIn PDF document text
    • http://didaneguk.pbworks.com/w/file/fetch/144427905/jagotekuwidixaza.pdfIn PDF document text
    • http://vedufid.pbworks.com/f/we_can_be_mended_free.pdfIn PDF document text
    • http://lezakoliz.pbworks.com/f/alcohol_120___crack_windows_7.pdfIn PDF document text
    • http://molitutolu.pbworks.com/w/file/fetch/144545958/wojogiwoxapibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1de99c40-792a-4531-9fbe-0309a9b4e274/1734-ib8_cad_drawing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f631b1f-eb17-4e80-8cb0-6da8dcf33c6c/moxazar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e54196e8-3101-4bda-b8d4-2a2e53b701fe/52328717270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce01fc79-6cfe-4469-96de-956277bdcce9/que_paso_ayer_2_elenco.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_off0000f7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CC 4572 bytes
SHA-256: 63a654c314ea8ec32423891127dcea04899f1ad0d0b97917ad75dc57f357aaec
font_01_sfnt_off0001074d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074D 11868 bytes
SHA-256: 71db12424cf7313199c7191b32e92e3b6a9af25dc066e0b01cfb1fb50bdad38b

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