Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf6eee8d9a44c8f0…

MALICIOUS

PDF

44.6 KB Created: 2020-10-02 00:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9f1e29fa88140edf3217f2188013041e SHA-1: 3f01ad7c6a35a69e67807d9e45b4500cf5a60a7f SHA-256: bf6eee8d9a44c8f0e0fc355419b626f8600b0fe5f307ed022946d055dc3b6bbb
124 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though obfuscated, contains text related to a '2005 honda accord owners manual pdf', suggesting a lure. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple links to disposable hosting further supports malicious intent.

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 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.
  • 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://cctraff.ru/strik?keyword=2005+honda+accord+owners+manual+pdf In PDF document text
    • http://files.winndems.org/uploads/1/3/0/7/130776619/d0e279a8d88.pdfIn PDF document text
    • http://xozurovi.lmt-photo.com/uploads/1/3/0/7/130739090/9732055.pdfIn PDF document text
    • http://files.dramasheppard.com/uploads/1/3/0/7/130776852/beforirukunafexugon.pdfIn PDF document text
    • http://files.cambridgevalleyfarmersmarket.com/uploads/1/3/1/3/131380687/b6d54.pdfIn PDF document text
    • http://files.38plus2productions.com/uploads/1/3/0/7/130739745/de763288.pdfIn PDF document text
    • http://files.digitalsimon.com/uploads/1/3/0/7/130775267/3533482.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://cdn.shopify.com/s/files/1/0484/5833/4358/files/rukedofuxaladesujowawe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5128/1315/files/seven_cats_inn_thaler.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/0206/9667/files/xotulezufuxinuje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc9f4cef-3062-41ae-a2b7-fe66b72a5711/56829834980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdb386c2-68d3-4210-afc7-e21e4ecdd579/vejenumezisodejef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4674b249-fddc-4016-b0d5-3394602db987/dafesamebuje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a4cb1f6-7417-4da7-b477-e89caac3a295/48751188024.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A3 5544 bytes
SHA-256: ad322fb383185b4a896f2c12dfae683932264ba5460676100c5cf99bbd42e570
font_01_sfnt_off0000744a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x744A 10164 bytes
SHA-256: d963d0ed47bb6a0b26c5d2d1515577aa642ebc09fc151c12a7c21cb82eb18fcd
font_02_sfnt_off000096fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96FA 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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