Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f180bf5b3ce2f7c…

MALICIOUS

PDF

83.1 KB Created: 2021-03-21 08:58:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 716cadb5c98e8d20db423fb99967f188 SHA-1: 58685f6375bc58c0f2db6bf14c7406d5143ed265 SHA-256: 4f180bf5b3ce2f7c1381eab281921280cb1b63b89fb390262dcc7e9490d7cbdb
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 0.9998

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 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://dugedepap.ru/strik?utm_term=vishnu+sahasranamam+sanskrit+text PDF link annotation
    • http://wasatosu.sportsontheweb.net/easy_beatles_guitar_sheet_music_free.pdfIn PDF document text
    • http://peteferix.mypressonline.com/vokidibudaf.pdfIn PDF document text
    • http://pigigozoruda.mypressonline.com/hamlets_mill_book.pdfIn PDF document text
    • http://wojibutego.22web.org/zebra_gk420t_master_reset.pdfIn PDF document text
    • http://xufonewujisos.scienceontheweb.net/kubikafegaxoxupus.pdfIn PDF document text
    • http://lonagonem.22web.org/can_pink_dye_pregnancy_test_evaporation_line.pdfIn PDF document text
    • http://xubanapirobula.mypressonline.com/jedawafa.pdfIn PDF document text
    • http://paxosij.mygamesonline.org/75092854184.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/69ab7dd5-d2a9-473e-8252-22245df40b29/what_pets_are_permissible_in_islam.pdfIn PDF document text
    • https://488c2ff9-9ff4-499e-8f11-525115e20b22.filesusr.com/ugd/8aba0c_dd073f2978034c5ca5f1cacd3dc3d5e5.pdf?index=trueIn PDF document text
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_b4798522441a46d7b2ad890f0e2c073b.pdf?index=trueIn PDF document text
    • https://4b002d3c-a55f-42ce-816c-238f848e88a9.filesusr.com/ugd/3398cc_fb8f28838961410ba4393193ff458a21.pdf?index=trueIn PDF document text
    • https://6762652a-e869-40f3-960d-1446d4066230.filesusr.com/ugd/55e6b1_2439f85fab974c2ea1c6e7ebce41b57a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/06ab5941-85d1-4d6e-8240-432e3c4be7c4/tidonezug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/511143fe-9a90-4647-8d6a-b9d98c27b425/84530751251.pdfIn PDF document text
    • http://wemiwapava.epizy.com/79205951270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80fef902-49c8-4c23-9c8a-49b2e89bfebf/pazosam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3370ece5-cd36-4736-9ba1-acecf476c28e/taco_bell_beefy_5_layer_burrito_recipe.pdfIn PDF document text
    • https://3ecb585b-79b8-4502-8567-d9a17299c5c1.filesusr.com/ugd/4b874d_35067b59e31e49d0ab93f7a70c688279.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B8 4988 bytes
SHA-256: 6e08525f81900ac5c431b5b4377838878f30c51c88e8958a1d11c03f6af27b30
font_01_sfnt_off00011a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A87 11336 bytes
SHA-256: 5103997ae18afdcb523067ce13944e96c885181640cd663d7a53080848b3b55c

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