Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cf45314af3f57c1…

MALICIOUS

PDF

80.9 KB Created: 2021-03-23 00:13:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7ec6d8d33bbf146d9d2faa2862e89612 SHA-1: b1bb1fcc4d60f7116c578ebdeb488341279bd478 SHA-256: 3cf45314af3f57c1c050c38188bfd5463b4a7bb9621700694e72d416bb64834c
96 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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/award?keyword=blank+u.+s.+map+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422908/normal_60430eb5c0f68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501374/normal_5fe99cd564d0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_604d06f71da4a.pdfIn PDF document text
    • http://gedatidigog.sportsontheweb.net/isyoung_automatic_pet_feeder_instructions.pdfIn PDF document text
    • http://vatemuredaxusob.22web.org/hppsc_answer_key_hpas_2019.pdfIn PDF document text
    • http://buxeletifexid.medianewsonline.com/biblia_dios_habla_hoy_free_download.pdfIn PDF document text
    • http://rarurude.22web.org/embankment_dam_solved_problems.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_3b537af4be644d508533f70585630c1b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/72190504021.pdfIn PDF document text
    • https://f72b89be-0fa6-41ee-8162-331329ef78ce.filesusr.com/ugd/95089d_b73a8a3ec4ef45d482d23578ddd8ad31.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/ravubenaxikuton.pdfIn PDF document text
    • https://d7d9470a-9784-4c28-ac68-b1ab0f70ddf3.filesusr.com/ugd/148484_396c6a17a20546e7b84a1fa14be3c0cd.pdf?index=trueIn PDF document text
    • http://zamoguwudegovo.rf.gd/afterlife_apk_data.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/pharmacology_textbook_drive.pdfIn PDF document text
    • http://rajokawaxes.rf.gd/86609874657.pdfIn PDF document text
    • https://c140f178-ee45-427e-91fe-a3c5f821f67e.filesusr.com/ugd/ebc5f9_caae8f5d60fe4bed849f3e06d6761628.pdf?index=trueIn PDF document text
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_87392ae4610d43c499b5df53697ac750.pdf?index=trueIn PDF document text
    • https://9170d309-caca-4186-8987-bf6b40ce219c.filesusr.com/ugd/baef12_8ddf57808f6844caab39a3384c47088d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/waduzirader/vepuvojefomere.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/xamogorov.pdfIn PDF document text
    • http://fepesori.rf.gd/las_7_bellas_artes_definicion.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f40c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40C 2828 bytes
SHA-256: e107a41c86adb7bd4c3b16d4b038ee5acae0fd4ef0a78cb1ec05ff987e5df2fe
font_01_sfnt_off0000fe22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE22 5236 bytes
SHA-256: 32dae24a1894070a5a03432d2e7dd2051bb07493c5126118e6e402e4a49f16b1
font_02_sfnt_off00010feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FEB 10692 bytes
SHA-256: e6401b7592e168dc8dd308524f35111a03fe9b0747b428bbce82a3474064c5c8

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