Malicious PDF — malware analysis report

Static analysis result for SHA-256 bac5a281a92ffc63…

MALICIOUS

PDF

54.3 KB Created: 2020-11-08 22:39:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2744c93b4b535c5db00dcbe01c4a8e06 SHA-1: 6c30bc52d19c3d4beeea8f96e049f46874f5131e SHA-256: bac5a281a92ffc639d26b5f61e199129ebb81ce2daee10de7fe66fc4ff8b008c
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and heuristics indicating it functions as a redirector to malicious infrastructure. It contains a large number of embedded links, many of which point to suspicious domains, suggesting a link farm or phishing attempt. The document body, though partially corrupted, contains a URL that aligns with the identified malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?keyword=cognizable+meaning+in+telugu In PDF document text
    • https://vejegiraforid.weebly.com/uploads/1/3/4/3/134311029/4978183.pdfIn PDF document text
    • https://zijubanefim.weebly.com/uploads/1/3/4/3/134349059/fevaze.pdfIn PDF document text
    • https://sosegesidor.weebly.com/uploads/1/3/4/4/134465043/lisarudep.pdfIn PDF document text
    • https://wufipalowev.weebly.com/uploads/1/3/4/5/134595621/e954e6ce3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://jajofexi.files.wordpress.com/2020/11/monitoring_visit_follow-_up_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/roblox_game_jam_2020_games.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/pegajok.pdfIn PDF document text
    • https://zozozalugid.files.wordpress.com/2020/11/bedelukidunewifitor.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/60259302203.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/94701795661.pdfIn PDF document text
    • https://zilukog.files.wordpress.com/2020/11/movotemewuxedajebakodevur.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/13366041401.pdfIn PDF document text
    • https://temobozuz.files.wordpress.com/2020/11/95471855296.pdfIn PDF document text
    • https://sufitisuge.files.wordpress.com/2020/11/86028972573.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/xawaxivefebomozod.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_off00006cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC1 4824 bytes
SHA-256: a42bda8670c59a38a93807de34255fb1ff6575742ad419426a20585fdee77173
font_01_sfnt_off00007d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D24 7028 bytes
SHA-256: 33e97dd647601b54fc8e905616876e2bdfddfcf9feb809dca2bb5829742f9d8b
font_02_sfnt_off0000932c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x932C 10256 bytes
SHA-256: be6e3b92536a14d6edd209a83f002acd1e935e1bc99b3598a8760e1e22ffbe5b
font_03_sfnt_off0000b677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB677 16096 bytes
SHA-256: 2dff1fc3e5bf1049a512ca2ab3d4448021a5e4676c0c9a63fbc3d390c83797d9

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