Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bf276e08cfef0a1…

MALICIOUS

PDF

74.2 KB Created: 2021-03-15 00:54:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6ae984dfe89ae3e2d0f9d294278896ae SHA-1: b0c21c0f93e22905c1ba3380ae9b1db62bd2850e SHA-256: 7bf276e08cfef0a170a5c9990982bec6e63a9e962f2709b32d6fbe8147ce28bb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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 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://dugedepap.ru/123?utm_term=doctor+strange+full+movie++in+tamil PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412570/normal_6018335710d68.pdfIn PDF document text
    • http://dabopoxele.getenjoyment.net/what_is_the_average_salary_for_an_engineering_technician.pdfIn PDF document text
    • http://kunepuvobimamin.medianewsonline.com/maximum_normal_stress_theory_example.pdfIn PDF document text
    • http://xudogiborijum.66ghz.com/brick_making_process.pdfIn PDF document text
    • http://scarcebook.com/10848398793q91o4.pdfIn PDF document text
    • https://cdn.sqhk.co/fagiseregu/5hcNGgd/zigzagoon_galarian_moveset.pdfIn PDF document text
    • https://cdn.sqhk.co/wesaduleb/jchbThe/xotorifojatutawokitife.pdfIn PDF document text
    • https://cdn.sqhk.co/bupedamarib/hhhcCPx/birds_of_prey_pop_vinyl_zing.pdfIn PDF document text
    • https://cdn.sqhk.co/mugukawi/ieiigig/76995322517.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369330/normal_6003890e9a634.pdfIn PDF document text
    • http://teplotronic.ru/amplificador_push_pullw9d8p.pdfIn PDF document text
    • https://cdn.sqhk.co/ramawuvade/Yiiij6L/dusowotalajeregiweporabox.pdfIn PDF document text
    • http://islandlandscapesbb.com/sherlock_holmes_books_in_tamilswzh1.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vipowiso.epizy.com/bandook_chalegi_song_remix.pdfIn PDF document text
    • http://xumizaxojumiko.epizy.com/76584975520.pdfIn PDF document text
    • http://bilisedutave.myartsonline.com/39831734289.pdfIn PDF document text
    • http://domawodevanaga.rf.gd/business_plan_writing_software_free.pdfIn PDF document text
    • http://metepukiwameme.epizy.com/armitron_all_sport_instructions.pdfIn PDF document text
    • http://kuzemepusiloj.onlinewebshop.net/lukugituwudefefiwujoke.pdfIn PDF document text
    • http://kudogal.rf.gd/dudum.pdfIn PDF document text
    • http://bezegorev.epizy.com/connecting_arithmetic_to_algebra.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
stream_004_off0000dce9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDCE9 11036 bytes
SHA-256: 2c8612475f95beffec6ce21ea99d0c9607426dc1c3c49da8f3e169b35dd6638d
font_00_sfnt_off0000cb07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB07 5260 bytes
SHA-256: dff31876823f67a7a91fe0a074250c0874a22718f1af7e28c2ed6f15bf9bbac6
font_02_sfnt_off0000f93d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93D 9928 bytes
SHA-256: ecf73624278ba027332a1076f197b737698ee4c34fc77f1659aacedb3c847534

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