Malicious PDF — malware analysis report

Static analysis result for SHA-256 e745be2b0b590312…

MALICIOUS

PDF

72.8 KB Created: 2021-03-20 10:31:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0c16e29e371742a9b77f7a7168e12bbc SHA-1: 47734ab1e207021dc5e3b7f0654b7e7c1f128319 SHA-256: e745be2b0b590312b8048f6052e2f7a219584014ec7b88c98dfa39159f54cc01
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable hosting, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity, likely related to spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ponafet.ru/strik?utm_term=el+coronel+restaurant+sebastopol+ca PDF link annotation
    • https://xalifabosivibu.weebly.com/uploads/1/3/0/7/130775217/99777d2e54.pdfIn PDF document text
    • https://duxebiforup.weebly.com/uploads/1/3/4/0/134013009/gifebumu.pdfIn PDF document text
    • http://zixosoliga.iblogger.org/prentice_hall_mathematics_pre-algebra_online_textbook.pdfIn PDF document text
    • https://fukituxepuronip.weebly.com/uploads/1/3/4/6/134605821/pexogid-gavopenef-xafuram.pdfIn PDF document text
    • http://nesebonuvobeju.getenjoyment.net/anatomical_positions_of_the_body.pdfIn PDF document text
    • https://zopadujebononi.weebly.com/uploads/1/3/1/3/131380983/basakevoni_fatitesem_dotidipe.pdfIn PDF document text
    • https://vuminuzatadabem.weebly.com/uploads/1/3/4/3/134311796/441766.pdfIn PDF document text
    • http://govakokes.22web.org/tutixes.pdfIn PDF document text
    • http://fumuroruzej.medianewsonline.com/bursary_motivational_letter_sample.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2063ae3b-b6ca-44db-af01-0267e92d5a2f/how_many_spell_slots_do_sorcerers_have.pdfIn PDF document text
    • https://dc273c12-e125-4738-b2e6-b96bc4bd5eb7.filesusr.com/ugd/c8df25_44dd2aecbbfb4fa5adba9ffc5f49a43d.pdf?index=trueIn PDF document text
    • http://penanaras.myartsonline.com/angularjs_6_interview_questions_and_answers_for_experienced.pdfIn PDF document text
    • http://luzirilokupozar.rf.gd/77107161868.pdfIn PDF document text
    • https://a804c8a8-fdf7-4fba-b19b-c23aecc29597.filesusr.com/ugd/a7074a_c251e1b1e45642b18fdf2b2ceea06852.pdf?index=trueIn PDF document text
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_58bd8518ac334e1e8470212f7bd527dd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/13480efc-0ea4-491f-9e71-fabd507cf627/64931542037.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f18c99b-9e2b-4440-a36a-8b6b84441443/9710838653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c780fc2-ca29-42c4-8dfb-81bbe159a268/basic_electrical_engineering_all_formulas.pdfIn PDF document text
    • http://govativa.rf.gd/rakokunafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/484d4c74-784a-46c5-a7d9-b877be16d089/10633458968.pdfIn PDF document text
    • http://lekeladanipot.epizy.com/diary_of_a_wimpy_kid_old_school_reading_level.pdfIn PDF document text
    • https://451b78f8-089e-4d4d-bc4b-60abb621f7e6.filesusr.com/ugd/7ef0dc_8fca5388563e44f78650743ba73936eb.pdf?index=trueIn 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
font_00_sfnt_off0000d379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD379 4856 bytes
SHA-256: 2b03ef0ee64c2415dabf26dfbb1bae8996a63f4ab90da93c0fd37a8d38c52867
font_01_sfnt_off0000e3fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FE 10672 bytes
SHA-256: e531748a80140917cbe6ed1cb3fac1d3b9384fa84e63a62b0387999cfffe8cb9
font_02_sfnt_off000107b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B0 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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