Malicious PDF — malware analysis report

Static analysis result for SHA-256 2011b02aeb6679a9…

MALICIOUS

PDF

101.0 KB Created: 2021-04-21 12:29:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: de1cbe1056da60d7e3d3335fc67ebf42 SHA-1: dd1ad3a6e209fe2fcb6fc45edb6654074e50f7b5 SHA-256: 2011b02aeb6679a95b032447dc246284141e9eabc77ce59343ddb2885643eb17
156 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 0.9994

Heuristics 5

  • 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.
  • 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://lozipotod.ru/strik?utm_term=dean+koontz+graphic+novels+list PDF link annotation
    • http://harmony-market.ru/dell_optiplex_3010_desktop_computer_i5_3470dcsve.pdfIn PDF document text
    • http://sovetnik53.ru/36829137310u7ug6.pdfIn PDF document text
    • http://lifeshop.pro/mepifax3fe2p.pdfIn PDF document text
    • http://zifijovimijita.iblogger.org/who_makes_bolens_riding_mowers.pdfIn PDF document text
    • https://fopozawiluni.weebly.com/uploads/1/3/4/3/134383369/1894306.pdfIn PDF document text
    • http://laruvunowos.22web.org/mawarewit.pdfIn PDF document text
    • http://walabakubu.iblogger.org/ratutidisubixubivadoj.pdfIn PDF document text
    • https://fofosefekilom.weebly.com/uploads/1/3/0/8/130813764/8437959.pdfIn PDF document text
    • https://rizitutidu.weebly.com/uploads/1/3/1/8/131856545/gesimepawejowu.pdfIn PDF document text
    • http://sokolov.fun/scratch_game_tutorial_advanced5hzch.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a3c73713-be4b-4c8d-a01f-dab92ecb4e1a.filesusr.com/ugd/5df860_89d77837fa2a4171a93febbbedd2b1c5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/zavibopupetovor.pdfIn PDF document text
    • https://bc260b4e-efc2-469d-9102-9c7234992d76.filesusr.com/ugd/b1b3ad_c986e3e0940e4e6ab266b9e20fdc9595.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zopenave/why_isnt_my_roku_express_remote_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74f0b28e-45e2-434b-923e-83e076ac158d/what_kind_of_transmission_fluid_do_i_put_in_a_2000_ford_explorer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c699f99f-4276-49cb-b5c3-cbdbd6eda300/what_was_socrates_message_in_the_apology.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/61509945081.pdfIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_a61338711e8146fb8b25fba18b694e86.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/baixar_bematech_4_pro.pdfIn PDF document text
    • http://fixagebixolupi.epizy.com/1999_kawasaki_mule_2510_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xofalepelala/87604723128.pdfIn PDF document text
    • https://4590046d-f0a9-4171-b8a0-56ff8c1fe63c.filesusr.com/ugd/0bfb20_da3c5d111a174c7ea38c1edf6c683ea8.pdf?index=trueIn PDF document text
    • https://b6f97e74-198a-461d-a312-d71b9712332b.filesusr.com/ugd/a2d007_13f64f0eb17e49e0a1a28a3df3785b13.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_off00014da7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DA7 5368 bytes
SHA-256: 61a90fe67e27afb709a5c93626eed944981addd63bc0956a1b259e4d6d6ecea4
font_01_sfnt_off00016003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16003 11208 bytes
SHA-256: 6bc055c23f15d22bcb12e32ddf5883781c7cd931815a1345533c87e976728dcc

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