Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0fb22de668c3a1…

MALICIOUS

PDF

68.9 KB Created: 2021-03-20 04:53:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 02392ad5b57a2be79ccab21f8e8ef276 SHA-1: 9e03a94d9531c1251a5b5440bb926304adf1432d SHA-256: 8e0fb22de668c3a107afbaba33b66f8d9e460487059c56d203b7cf1a83e6153d
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://nipisod.ru/award?keyword=animator+s+survival+kit+expanded+edition+pdf+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4371013/normal_5fc99aa346555.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381988/normal_5fe5576ee4b73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450038/normal_5ff16cff5f6f4.pdfIn PDF document text
    • http://legegapepapo.medianewsonline.com/phrasal_verb_meaning_in_hindi.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/jololekoxazewusabuj.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/real_estate_programs_near_me.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/b220eed2-b3ab-4bb1-9c91-e49015ee2ae0/ge_nautilus_dishwasher_parts_manual.pdfIn PDF document text
    • http://xutulatovemi.epizy.com/financial_analysis_report_of_a_company.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b84bec3f-e2f9-4192-8e07-87ffc5a92dde/kemewazalom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1be0a14-d9a2-40b8-8e22-5c0cade79646/introduction_to_classical_mechanics_with_problems_and_solutions_solution_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d6ccb2e-a7ba-491c-991c-a2b790cbb4eb/the_power_of_love_huey_lewis_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28abedeb-4e11-4a04-89bf-f588fedbc8a4/how_to_reset_dlink_dir-615_to_factory_settings.pdfIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_cfa65dc7d43641b09efeadc96c8b5047.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/082234a9-ad7e-4b7a-8ec1-9e73f0d136f3/cub_cadet_lt1050_service_kit.pdfIn PDF document text
    • http://vuzozan.epizy.com/rifedazaromad.pdfIn PDF document text
    • https://bc5ba30c-e427-49eb-abc4-9677f18f04c1.filesusr.com/ugd/bcd086_b3129493c7074b6680c46c6f47e1dc0f.pdf?index=trueIn PDF document text
    • https://30de3caf-c510-4ce9-8691-b8280dc60d9b.filesusr.com/ugd/4980ee_502d097a5bcb4acf83d0e70cf63336c9.pdf?index=trueIn PDF document text
    • http://bunulewokiluko.epizy.com/96683974820.pdfIn PDF document text
    • http://tepokubomime.rf.gd/femuzunifev.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_off0000d12b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD12B 5460 bytes
SHA-256: 1316e94d11745b67981faf76d0f11bf0e89ef309901449ea9baa6f6463ab97c9
font_01_sfnt_off0000e3b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B9 10044 bytes
SHA-256: d3544b3addcdd72271f9e7d6badc59806b7c429edbd6a42e8dc707ec4243b0a1

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