Malicious PDF — malware analysis report

Static analysis result for SHA-256 147cf13c37c66db5…

MALICIOUS

PDF

40.1 KB Created: 2021-03-18 16:40:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: df4d156ae8a231a6d3fa26d1b7b6d1a4 SHA-1: 823e7e47349fd4336a859bea9dddfee827847405 SHA-256: 147cf13c37c66db5e5f1bdf79f2bbed8de662935d57aba4bb36b97814d041cad
204 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7988

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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 40 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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
  • 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://kuzutuzo.ru/award?keyword=single+molecule+cellular+biophysics+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369508/normal_5fcfeb1b7a8aa.pdfIn PDF document text
    • https://xukonupuzifig.weebly.com/uploads/1/3/4/6/134621954/4732048.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447640/normal_5ffd085d843bf.pdfIn PDF document text
    • http://wigageturuv.mywebcommunity.org/mubig.pdfIn PDF document text
    • https://kogusixotitijib.weebly.com/uploads/1/3/4/6/134692341/c6c43375f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465250/normal_6040e131c2e4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402724/normal_5fe205642a5e8.pdfIn PDF document text
    • https://fuwefepitebu.weebly.com/uploads/1/3/4/7/134709748/nodepuzige.pdfIn PDF document text
    • http://lafutib.sportsontheweb.net/anemia_kekurangan_zat_besi.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/cant_access_my_wd_my_cloud.pdfIn PDF document text
    • http://tuxefovibipudun.epizy.com/drudge_retort_vs_drudge_report.pdfIn PDF document text
    • http://fepoxojosatomu.epizy.com/kesenibelileweboke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2ef457f-b863-4707-96d2-ccb8cee2ff12/kinojigajid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/892cce80-85b9-43bc-9750-bc8b1a531761/architecture_technical_drawing_book.pdfIn PDF document text
    • http://daxevetefixidaj.epizy.com/77470646230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a4dfbc0-9fe1-4f58-a10d-295f8c809648/dadinoxijenukeluse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02df92a2-6da3-464f-b7fd-794f3aa7a9e3/14570312187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a07199a9-a386-484c-98bd-ad15a9525e7b/35245958124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e22c403-7c48-4c88-9125-f4a25957c69f/what_is_ethics_education_in_nursing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cf51a4f-d11a-4651-8e0a-bd2cff5b4fca/pathfinder_npc_codex_trove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5efa5c6-9bb6-4f75-a720-f337ca35b637/1817977194.pdfIn PDF document text

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