Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f0d8ad84e14f324…

MALICIOUS

PDF

74.8 KB Created: 2021-06-09 05:52:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: da8c2f1d70913480940d189c243428b3 SHA-1: 6a06f81d1f2e50d261d2e48d51aee18ecda4ecb2 SHA-256: 0f0d8ad84e14f3240e9a7a2e9b437061c12d6fde09e056bf7324767149249822
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating a link farm for external PDFs, with one prominent URL pointing to a site that appears to be a lure for downloading content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself is designed to lead users to external, potentially malicious, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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://crewmak.ru/pbw?utm_term=uyire+tamil+movie+song+download PDF link annotation
    • https://nawawuxilebop.weebly.com/uploads/1/3/4/6/134679594/4bdbc43951ccd0.pdfIn PDF document text
    • https://najilemizosi.weebly.com/uploads/1/3/4/7/134730194/vosavesajuz-wadoruw-botexajo-sapopi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494432/normal_6014e433013af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449183/normal_603043c12fd5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481154/normal_5ff363d6d3b0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447641/normal_60bfa202c747f.pdfIn PDF document text
    • https://javodamujuwevef.weebly.com/uploads/1/3/4/4/134446411/4966167.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386622/normal_5fce09d7d0c57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495841/normal_5feb1cd15e0be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485454/normal_5ffa53b1120ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470688/normal_6059e93990688.pdfIn PDF document text
    • https://golotarati.weebly.com/uploads/1/3/1/8/131856611/7706522.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496391/normal_5fe345a53bb2b.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/929bfd6b-c8e5-408b-a93e-ce3100333ce4/20144027705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dff10c4b-9794-4d6f-b105-6b25d75f1c02/twilight_eclipse_full_movie_online_free_no_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8078884-c885-4859-8dc4-db7b429fb1f1/fanuc_cnc_programming_courses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/102d5295-53a3-4a61-bb34-0401818f5ea6/27673261494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17a03131-b66c-4284-ae3e-74946e6435c7/how_many_odd_cards_are_in_a_deck.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1730f7b-2560-429b-9cb4-87a8ac5b912e/schlage_keypad_door_lock_change_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42379002-2e13-40cb-8df0-b3c2756e737c/applied_hydrogeology_fetter_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cca5e190-dd42-4d20-86e4-9e70ef854c43/what_was_sigmund_freud_theory_of_dreams.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dd9060d-8b06-4ebe-b7a8-2e4bd6c18136/43414190345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93061daa-d099-4142-904f-5eafe2f172a2/51314768124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4cc3d15-6559-40d1-8f1f-da309d5d7394/how_to_connect_my_xfinity_remote_to_my_soundbar.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_off0000e6d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D5 5392 bytes
SHA-256: bf14b425298f99522ce34dda0a947cbea1af106376ef5ddd0b9779f8549a27cb
font_01_sfnt_off0000f92d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92D 10712 bytes
SHA-256: fd33606515435f1df07da890e9c558723f7834f4b287994ec7b7d91af271c246