Malicious PDF — malware analysis report

Static analysis result for SHA-256 13d62b3826c5270d…

MALICIOUS

PDF

96.8 KB Created: 2021-03-28 13:30:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5818120a2761bc95f7c0c27b24d0bbf6 SHA-1: 230b462071f8706e9259b45292bb3a646e36f044 SHA-256: 13d62b3826c5270d37d671350fee450dffdd6829c2e323f00bb662b0be060277
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://soxebez.ru/award?keyword=cuento+de+la+bella+y+la+bestia+corto+pdf PDF link annotation
    • http://mantenancie.com/why_was_fredo_killed_in_godfather_2okdkl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403271/normal_605e127e038b4.pdfIn PDF document text
    • http://gebigulexejo.sportsontheweb.net/xijononasok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496389/normal_605656d19722f.pdfIn PDF document text
    • http://trysoda.pro/jumizedusobbrh1w.pdfIn PDF document text
    • http://kefudepoduwudi.sportsontheweb.net/cell_biology_textbook_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392215/normal_602711c6a8f3b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404965/normal_60002a2d236de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404308/normal_600673ac0c4e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446165/normal_602291b90e34d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454541/normal_600519620896e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417024/normal_5ff5ea69644b3.pdfIn PDF document text
    • http://korilemule.iblogger.org/bharathiyar_kavithaigal_in_tamil_with_meaning.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5a20c861-23fd-468b-888e-078c5342874f.filesusr.com/ugd/924841_6f02b378bf66492da1ea7da5f52aa22c.pdf?index=trueIn PDF document text
    • https://1e1f235d-56dd-4976-b20d-d38e3fe7b172.filesusr.com/ugd/210b45_46931a01e018485d98a5587cf436b78d.pdf?index=trueIn PDF document text
    • http://dexadusoxeb.atwebpages.com/convertir_a_word_online_gratis.pdfIn PDF document text
    • https://315736c7-1030-4200-8d24-05c9f4951019.filesusr.com/ugd/d19ca0_cda612fd43c741df9534ad5f5da20404.pdf?index=trueIn PDF document text
    • https://d4508431-0eee-4913-ac2a-2ec907ed9b18.filesusr.com/ugd/12daa7_c70de1f005d540e6bd3c4f013efd2d5b.pdf?index=trueIn PDF document text
    • http://rujidafedisezu.atwebpages.com/how_much_do_clinical_psychologists_with_a_doctorate_make.pdfIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_2986cd8c1e0a4483a545de8ad5bbea6f.pdf?index=trueIn PDF document text
    • http://kasaxamaburabuz.epizy.com/62524632565.pdfIn PDF document text
    • http://wolobugoxew.myartsonline.com/samsung_dv45h7000ew_a2_service_manual.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_off00013c42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C42 5296 bytes
SHA-256: 99f24cbf30d03c9cebbcd8e02bb5d0c2d93194f059c79b4226d91abeb29c7546
font_01_sfnt_off00014e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E54 11556 bytes
SHA-256: 40f8d95dc65e10096018a412f26de2adf876e451ad59991670e26af77ca2cb50

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