Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06f41d6ff46f2ac…

MALICIOUS

PDF

77.7 KB Created: 2021-03-10 23:10:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a04d2e16f349bd9d7a44c02173f499c6 SHA-1: 17ceb4385a30b22b27f9351748bb55269efa66c2 SHA-256: d06f41d6ff46f2ac1c1c16a9274338378e4dbfa051bb0dc58725ab550cc3b47b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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://xezojetit.ru/strik?utm_term=walgreens+blood+pressure+monitor+owners+manual PDF link annotation
    • http://mopexaxurip.getenjoyment.net/99503351644.pdfIn PDF document text
    • https://wiwujakibites.weebly.com/uploads/1/3/0/7/130740442/ff483c9b034563.pdfIn PDF document text
    • https://jukatuve.weebly.com/uploads/1/3/2/7/132741058/ea7623.pdfIn PDF document text
    • https://japarikadag.weebly.com/uploads/1/3/4/1/134108792/gedikoxubase.pdfIn PDF document text
    • http://tuzojexis.mypressonline.com/blank_world_map_countries_quiz.pdfIn PDF document text
    • http://fawaxifiwuzodil.scienceontheweb.net/anexo_3_icao.pdfIn PDF document text
    • http://kifisafobubupo.mygamesonline.org/776860411.pdfIn PDF document text
    • https://bosamekuxukis.weebly.com/uploads/1/3/4/6/134672370/8964447a.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/61737796535.pdfIn PDF document text
    • https://gapepaweduli.weebly.com/uploads/1/3/5/4/135400658/wikerokafafun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/mariam_khan_reporting_live_written_story.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/skyrim_how_to_get_rid_of_the_dark_brotherhood_forever_quest.pdfIn PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_17a802b03ca7403bbe8afc2ab122cfed.pdf?index=trueIn PDF document text
    • https://eaa62ee9-779c-4a2d-9f50-6c66b019a99c.filesusr.com/ugd/1cc777_d7faf8cb6c3c49958911e8f46bc34c51.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/30a9cace-8f1b-45a0-910b-c9a77bcfaf46/zinokiwavosuva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca7b608d-46fa-4ed3-aa86-f1a5ff44542a/pmbok_guide_7th_edition_pmi.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/73322993990.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7586178-f86a-4c30-9fdb-44b72c5d94a7/audacity_up_meaning_in_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1685e751-c5ed-4112-9f6c-cd3a2017d3ce/mimalexikodigejemuxu.pdfIn PDF document text
    • https://ad0d0dbb-669b-46a9-85df-79487014a0f3.filesusr.com/ugd/00d95d_94537ed43f6e433b987f238b5bbc2635.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF184 5524 bytes
SHA-256: b29d4755db30b10decaeb91728dd543e29a3861768ee23338a69506761f7286b
font_01_sfnt_off00010448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10448 10864 bytes
SHA-256: 0d6ea0fdcf1ebd57bf56c5c0fa81d5c34960bc50d18c1ef27de9520326581599

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