Malicious PDF — malware analysis report

Static analysis result for SHA-256 0127fe07b3eaa163…

MALICIOUS

PDF

75.4 KB Created: 2020-12-21 21:44:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: bb89e97cffa0362fcee3bedded89ac26 SHA-1: 07acd5a5ae9c3ee4cd4666e760e90c31f958ecfa SHA-256: 0127fe07b3eaa163c5e8acbfdc2083e8a6deb8eb91ded89008351777b18f4c71
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, with heuristics indicating a 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM'. The primary URL identified is 'https://traffset.ru/strik?utm_term=rap+beats+to+buy', which is part of a larger link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffset.ru/strik?utm_term=rap+beats+to+buy PDF link annotation
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/4657930.pdfIn PDF document text
    • https://xemojunaxumig.weebly.com/uploads/1/3/4/2/134265853/8567371.pdfIn PDF document text
    • https://buboledimuxum.weebly.com/uploads/1/3/4/0/134017333/kepuf.pdfIn PDF document text
    • https://gotitodurafa.weebly.com/uploads/1/3/4/3/134351762/nudipuworotenaz_zulakewekuvemaz_furudovatewepe_rizapilokuno.pdfIn PDF document text
    • https://demogevofowa.weebly.com/uploads/1/3/4/6/134608938/91cb04a40d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/somamere/meguladetivopugeloxusuf.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc581231452f90b7f043f90/t/5fd099335347e801a823fa69/1607506228941/50_tamil_nursery_rhymes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6a6afc6229360ecd4fc1b/t/5fd66132102ca46975e2e8f1/1607885106593/alpendorf_piste_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b03384c7-4852-4444-aa9e-a389b16448fb/65025419449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b3b86fa-6c7e-4019-96a8-fbe6c71e4b22/47579469092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3484cd1-626e-4adb-a468-c4e499e7c609/nolipokunoj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b59f9ea50d4120a35c7b/t/5fcdd8ff662d5e24e0c448f8/1607325952233/vikings_history_channel_season_6_episode_4.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/case_simulator_2_hack_apk_2019.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F4 4664 bytes
SHA-256: 2dcac1d45952e1bf2f308598dbad83a6053dd9752327c992006fcaa3068d5a95
font_01_sfnt_off0000d6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DE 11332 bytes
SHA-256: a473865a5a4d093ba0b761e6626373af28b6016c34436efa8afe840a0267ffb1
font_02_sfnt_off0000fd89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD89 16144 bytes
SHA-256: 18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b
font_03_sfnt_off00011289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11289 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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