Malicious PDF — malware analysis report

Static analysis result for SHA-256 4274bd6a92055195…

MALICIOUS

PDF

80.4 KB Created: 2021-03-18 04:00:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 47675e4ce64be8436e4345f4dd0fb0fc SHA-1: 16b69b8fa09e2884bdc458edd8e8d5903b68ad2e SHA-256: 4274bd6a92055195f2fed7610661f47926053aa8cfad21e8bd0b0414ac315ed6
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=ev3+line+follower+building+instructions PDF link annotation
    • http://card2card.live/panasonic_cordless_phone_service_center_in_ghaziabadtp067.pdfIn PDF document text
    • https://kenibojowosude.weebly.com/uploads/1/3/5/3/135324683/xesibofabuka.pdfIn PDF document text
    • http://asia.kiwi/pajugugipu6ac98.pdfIn PDF document text
    • http://trelon.fun/what_are_the_exemption_for_income_tax_2020-21poiw5.pdfIn PDF document text
    • https://cdn.sqhk.co/purorenutuw/enhbcgg/kizejemuzeluvipuv.pdfIn PDF document text
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/3828a5facf.pdfIn PDF document text
    • http://forexgeeks.net/universal_circular_saw_guide_rail_system0dk9q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387814/normal_6015c15c91714.pdfIn PDF document text
    • https://cdn.sqhk.co/xadakede/hj8wJjh/landlord_inventory_template_uk_word_document.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489994/normal_5fe48c2af0e4b.pdfIn PDF document text
    • http://shopbest.online/duwuxunazavufesosiwbfd3.pdfIn PDF document text
    • https://pegujugadul.weebly.com/uploads/1/3/1/6/131637136/ac6e8efd9c4c95.pdfIn PDF document text
    • https://welavomuwaj.weebly.com/uploads/1/3/4/6/134633166/jafazebarexug-risowakorij-febebumiguli-kutoviloj.pdfIn PDF document text
    • http://womenita.fun/what_is_the_story_of_movie_la_la_landf7z09.pdfIn PDF document text
    • http://top-shop-store.website/pocket_medicine_6th_edition_downloadzun4r.pdfIn PDF document text
    • http://optarfes.com/zabepivoxodedinsjz2.pdfIn PDF document text
    • https://cdn.sqhk.co/wajewukudino/hcSOHdg/pexels_api_call.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://01ff271a-2d66-4e22-ac0f-a796646d2f56.filesusr.com/ugd/8d93e9_b0683574ba6146f4a25fca42344d9681.pdf?index=trueIn PDF document text
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_800f8fb6966a4037aeea809ea8b8739c.pdf?index=trueIn PDF document text
    • https://a6132035-7465-4fe4-be4e-2faa96c22dab.filesusr.com/ugd/cf950b_8ffbeffad4224132b082d6c1623342a5.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_off0000f765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF765 5392 bytes
SHA-256: 6d7ab0d73ce9208e3eebd6734035915339bb1e4d301e3078f05949a031fe5d33
font_01_sfnt_off000109ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109ED 11816 bytes
SHA-256: 3c44349c3a302e410139c1f9b417f4a9e07bfaffd60f57986ac1f3cbe5c64d9b

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