Malicious PDF — malware analysis report

Static analysis result for SHA-256 4878b9ecb3d79695…

MALICIOUS

PDF

88.5 KB Created: 2020-12-24 11:41:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ed5cfa212aade49e5bb2f5e27d0c1d57 SHA-1: d7ab0381cf2681e7a91af35fe972ab832870b492 SHA-256: 4878b9ecb3d79695dec0c26f5a488d98e31c2998116150d82c7b72a4a2a7c3c8
126 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with one specifically referencing a 'Skyrim movement speed glitch fix' to entice users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for numerous links, suggesting a malicious intent to distribute or phish. The ML classifier and ClamAV detection strongly indicate malicious content, likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://trafficel.ru/123?utm_term=skyrim+movement+speed+glitch+fix PDF link annotation
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/vabozuwelusalad_risijovif.pdfIn PDF document text
    • https://novebeze.weebly.com/uploads/1/3/3/9/133997241/nelenixezagupud.pdfIn PDF document text
    • https://fonevufaj.weebly.com/uploads/1/3/4/4/134444269/2008047.pdfIn PDF document text
    • https://nafoxowozuvika.weebly.com/uploads/1/3/1/3/131383754/19748ca067d446.pdfIn PDF document text
    • https://vubilidupetox.weebly.com/uploads/1/3/0/9/130970012/8af090f.pdfIn PDF document text
    • https://mupoveno.weebly.com/uploads/1/3/4/3/134371030/tosofevup-mawaviwuzuzu-volasazovamasa-wodas.pdfIn PDF document text
    • https://jakilirimilibev.weebly.com/uploads/1/3/4/8/134862861/wobova.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/pudefonarira.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/44650b80-2b96-4598-9fb0-18b3512b3f32/pefakojitidilalagevomo.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/integral_calculus_ncert.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb181d94-7661-4d29-891a-4e59ceb89869/xekikoxaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82128e9d-1348-482f-b0d6-ef675dae01bf/principle_of_marketing_16th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/rekibedafowow/62441826650.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a35f6008-613c-4db3-b45f-6bcabf5bfe95/nudege.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://www.gnu.org/copyleft/gpl.htmlIn 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_off0000fc94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC94 1636 bytes
SHA-256: d372f978bc0864edd0e4f070bc1a804c10434f3d9d7da17a532c0134366d0db7
font_01_sfnt_off000104d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D1 5756 bytes
SHA-256: c158a15b0d02ec0b5d5f1b00fb746c29e971a7f10de4b5c7de88f73bc6007225
font_02_sfnt_off0001185f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185F 11340 bytes
SHA-256: 1d3085c079d23957a3e08dd5ffd9c7035fdf01c3e334ddfa95979ecf6bdd47ae
font_03_sfnt_off00013f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F66 16060 bytes
SHA-256: d93486909b7b994453b56cbe9ba86e805d8164129d42f4c52ef98bb3f1ec5a26

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