Malicious PDF — malware analysis report

Static analysis result for SHA-256 a429a8f96499074b…

MALICIOUS

PDF

72.6 KB Created: 2021-03-13 20:18:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 360f2c9a4f7bbb10936d56224c6939f6 SHA-1: dda8cdbbdeaa66a47a1ca9a44fe9333d657d188c SHA-256: a429a8f96499074ba1dfd8e9c94749b8e101ca63d3ed862bd3bde8431cd55659
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://midufefew.ru/award?keyword=balanced+literacy+instruction+a+teacher+s+resource+book+pdf PDF link annotation
    • https://manabuvajej.weebly.com/uploads/1/3/4/8/134847277/8105381.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408174/normal_60046d514eb89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377403/normal_6035dc422fac9.pdfIn PDF document text
    • https://raxipova.weebly.com/uploads/1/3/4/2/134234678/81ca348834.pdfIn PDF document text
    • https://subogepaweb.weebly.com/uploads/1/3/2/3/132302814/f71b69d0d8967.pdfIn PDF document text
    • https://seritixatot.weebly.com/uploads/1/3/1/0/131070849/wanaxinotadug.pdfIn PDF document text
    • https://sojabejob.weebly.com/uploads/1/3/4/8/134890412/8239158.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445736/normal_5ff75d70d6d31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467573/normal_5fdf2444a0a9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500430/normal_604383f274fc0.pdfIn PDF document text
    • https://rojanebe.weebly.com/uploads/1/3/1/6/131637229/b0334.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/3f9b4602-8917-4d4f-bcba-14db254b2671/what_type_of_plate_boundary_is_sumatra_indonesia.pdfIn PDF document text
    • https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_d0db59ab9ad442a8a46cf0d5700e5c35.pdf?index=trueIn PDF document text
    • https://ecab545c-19d2-4654-b6ac-fb8b9749f5ba.filesusr.com/ugd/e5412a_d91da80fc1154491999fa5492ebee8ed.pdf?index=trueIn PDF document text
    • https://53f03ce6-db0b-4f41-9bfc-6956ba41e1f4.filesusr.com/ugd/727e0f_9994154a733e4621948a040d6b3e2830.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/101d5843-0c94-4cae-90fb-db2d674d3a3b/jujoxizixot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2da8e9da-a54a-46f2-8fa0-495a170edf00/elite_3.2_qt_digital_air_fryer_reviews.pdfIn PDF document text
    • https://69df74eb-9f83-488d-97bb-abb55063df61.filesusr.com/ugd/f34323_46ff9d24843b4effba26cbf871d022ab.pdf?index=trueIn PDF document text
    • https://dca540c6-954d-4243-9f09-0921753db957.filesusr.com/ugd/974a4e_6165432be1fb4edaa69d73a6cd454720.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9b81c46-ffa7-4ae2-bdbf-4e10b474635d/71105851369.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8beffae-a29c-4972-a7bf-001fbf641fd4/2013_kenworth_t800_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5a49c60-6ad1-49c7-a549-c062efc83084/mivakemekojenisaput.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa2b0d1e-4e72-4409-8947-f12aaf90fe07/destination_imagination_instant_challenge_rising_stars.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6862078c-b711-4961-ae46-6ad15df805ce/crossfit_routine_with_dumbbells.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_off0000dd99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD99 5600 bytes
SHA-256: 752101c293edc269181dec9e98a7da192ae3c303196e235a06e9865f8c8b8aae
font_01_sfnt_off0000f09b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09B 10460 bytes
SHA-256: 9440ced052585594948ce37d383e511417ce17dacba8492969b9fb8e0e116ef5