Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd3c24417aa8e8a2…

MALICIOUS

PDF

51.2 KB Created: 2021-03-14 04:05:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3e0b5dc4ec5e23876f3e1a20ef826508 SHA-1: a7794c03522e90279d5302d4ddd6c161fc41e2d0 SHA-256: bd3c24417aa8e8a250b906ddea9bffec6e24d34f3796622dca2e69c5e8419721
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The ClamAV detection and ML classifier also flagged this file as malicious, suggesting it is part of a phishing or SEO spam campaign. The document body is heavily obfuscated and unreadable, but the presence of external links points to a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6386

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.
  • 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://xajibur.ru/wb?keyword=what%20dead%20stars%20mean PDF link annotation
    • https://cdn.sqhk.co/rumobotituda/ied8geC/adventureland_hours_tomorrow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385231/normal_5fd37a8104443.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/what_does_a_car_wash_include.pdfIn PDF document text
    • https://cdn.sqhk.co/soxobiwefili/Gh9Uiir/92369929075.pdfIn PDF document text
    • https://sakolepak.weebly.com/uploads/1/3/4/5/134588428/eee385d2540.pdfIn PDF document text
    • https://rorekejufekate.weebly.com/uploads/1/3/0/7/130740186/vemerazoxi.pdfIn PDF document text
    • https://cdn.sqhk.co/mibuxedufexi/Iji0hjk/99382430612.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/fuzegexozilisaxusu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465924/normal_5fe9b1760d9e7.pdfIn PDF document text
    • https://sunajekivogemaz.weebly.com/uploads/1/3/4/8/134895881/94bd088ae23626f.pdfIn PDF document text
    • https://cdn.sqhk.co/kakapoxavu/gBggRgf/story_video_maker_for_instagram.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482863/normal_602d891e9b338.pdfIn PDF document text
    • https://cdn.sqhk.co/bisegepamitu/lggnDnj/wish_me_happy_birthday_meme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482190/normal_5fe92f3bef3e4.pdfIn PDF document text
    • https://933527c5-e005-4225-a3aa-05fee46c7696.filesusr.com/ugd/b51dd5_71fcd0724bc644489fba619e3a90300c.pdf?index=trueIn PDF document text
    • https://e40da922-b0e4-44be-9878-2d4898ccab21.filesusr.com/ugd/3a38e0_405cab73d5d6470ca4774e7517529179.pdf?index=trueIn PDF document text
    • https://d6d3a1c5-32ce-46e9-ae92-c5b8d84d65d9.filesusr.com/ugd/a3b54b_c33b48c383924595ba0560b91243371e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ecd066e-9b5d-47c1-975a-8ab0a9ae462f/tapagiviwipube.pdfIn PDF document text
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_01806d732c164c2ea022cd8cea1f7024.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba5af1a7-a311-418e-a471-6c1d1ed318e3/ninoverobuxewekudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7b89a01-7f8e-4b79-8312-416684f6bf63/how_to_improve_editing_and_proofreading_skills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bbf9699-24eb-457c-988e-44bdc4b9ac62/93861766063.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6365122-82c9-495f-86ef-068d5b48f4e4/2_nephi_chapter_14_meaning.pdfIn PDF document text
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_7692358a59034a9cabfde98c4ec6d362.pdf?index=trueIn PDF document text

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