Malicious PDF — malware analysis report

Static analysis result for SHA-256 887ed414abf0b27b…

MALICIOUS

PDF

79.8 KB Created: 2021-05-23 12:32:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 52ea08c8bc44b250bf85c7b87fb45186 SHA-1: ca10abaaf26799299aa265d654e606c6c019d19e SHA-256: 887ed414abf0b27be90e0c982923ef3565bfbb41e728af91ce15e2d3d704f9d7
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a campaign designed to redirect users to potentially malicious sites, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://fokemale.ru/strik?utm_term=best+forex+to+trade+at+night PDF link annotation
    • https://pixofanipadolu.weebly.com/uploads/1/3/5/3/135326367/zinuguf.pdfIn PDF document text
    • https://wuletalevuvefam.weebly.com/uploads/1/3/1/3/131379877/kabekorulusatawelir.pdfIn PDF document text
    • https://jesugenug.weebly.com/uploads/1/3/1/4/131406432/koxuvel.pdfIn PDF document text
    • https://wamibujobaju.weebly.com/uploads/1/3/4/7/134716207/6125504.pdfIn PDF document text
    • https://talaxekagaros.weebly.com/uploads/1/3/5/3/135347480/mutuxatemujiz.pdfIn PDF document text
    • https://gisijenoxumo.weebly.com/uploads/1/3/1/4/131437849/7235779.pdfIn PDF document text
    • https://naluzakagowu.weebly.com/uploads/1/3/1/4/131411806/figogepexo_midugo_tilibemur.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/58a0a34e-b160-42ad-a168-a566d183468f/does_family_dollar_offer_health_insurance.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/bradley_smokers_for_sale_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c26a2fbd-bb93-4ec8-bba2-7761f918a0d8/59809750546.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17112864-4902-4b59-8b6c-3f0971a172df/48101789324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efd424ed-3ac2-47fb-b265-11bb55409ed8/53798321426.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7367a936-1c66-41be-b9cc-5b7c2b46e750/laptop_me_google_search_history_kaise_delete_kare.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/international_truck_starter_wiring_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/vegevorajaviwuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76a7d290-4e37-4a98-b402-dfa55380cc3c/what_is_19c_in_oracle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e55e874-8847-4225-9122-778335aafc7d/age_of_reason_law.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8be878b-d749-4dd4-b785-51f8ddb6a3eb/how_to_construct_an_acute_scalene_triangle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f6f0359-7296-4751-9e66-c2d4f2e39d2c/got_my_life_together_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f0a1aa3-847e-4729-866b-c5f8ebf58a5a/how_to_fix_kenmore_ice_maker_not_making_ice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52b58914-b324-455f-9f91-9b57b04939f1/pojepugafilomiwegiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e905b215-ddca-435b-95b9-6164613b6834/game_of_thrones_books_or_show_first.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/catalogue_ikea_cuisine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a294affc-379c-45ad-b2f9-dd6ec3cb3817/david_klein_organic_chemistry_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/brother_hl-2140_driver.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_off0000f9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A8 5256 bytes
SHA-256: e9add51283b0ab01dd6b9359222bb5a9b837ad4395cc307ca4bd74c87de81aa6
font_01_sfnt_off00010b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8B 11276 bytes
SHA-256: 47ec991bf497c6ff8ed62861150dd3d2c4db3c4eda50d002babd74f2c4633aaa