Malicious PDF — malware analysis report

Static analysis result for SHA-256 a26942d9edd60da3…

MALICIOUS

PDF

41.9 KB Created: 2020-10-04 20:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 806460c735efc0f497b497452f12dafe SHA-1: e035ff92f7b849c6000de84de1d211aff9ec3d62 SHA-256: a26942d9edd60da3e4ea04589ddbbc608b0bd0e44b448bf0fd847995c9a145e4
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://gettraff.ru/pify?keyword=gopro+be+a+hero+imc+campaign In PDF document text
    • http://files.idealworkmicrotopping.co.uk/uploads/1/3/1/4/131453540/zetepikuziwokol.pdfIn PDF document text
    • http://jupefusa.dphsart.org/uploads/1/3/0/7/130739344/9073402.pdfIn PDF document text
    • http://ramuk.southingtonrepublicans.net/uploads/1/3/1/3/131380429/9e9bfca.pdfIn PDF document text
    • https://site-1039400.mozfiles.com/files/1039400/88368400209.pdfIn PDF document text
    • https://site-1036724.mozfiles.com/files/1036724/lipabisiranisuvezimexafi.pdfIn PDF document text
    • https://site-1038789.mozfiles.com/files/1038789/49161137423.pdfIn PDF document text
    • https://site-1041491.mozfiles.com/files/1041491/26140528799.pdfIn PDF document text
    • https://site-1040974.mozfiles.com/files/1040974/95505025866.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/57b432ed-32ec-49b9-846c-78e57386642b/ziwovodufekiwuba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad8846ab-68df-47e1-9479-dbe3ede42631/kuxamejukadelotonigizero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bda47c45-3ae4-49cc-8e5c-03832d661573/pukerutadut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db305d1f-aac9-4bac-9d69-dce4991a6684/zipajutiximozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19ffd35c-498d-476c-89d1-843451b1692d/xoturikiperopi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ef8c3fe-1617-4d95-b60d-b525dbf80736/barurorupanutasabapadaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95b035cc-638c-4ddf-a0dd-aa8ab9d8e9ad/xemofalapegatabeleberar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/629a8287-ca0e-427d-9226-76e3ab812a14/javakesivisurogegepog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f31cfd1a-5dd6-4a90-b76e-2ca415d2c801/pikegedulugetotawatis.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6593 5308 bytes
SHA-256: 2b6579510260fe4d2afdf6bef7375f0650041dd4fa35d3c71713bc4ac50c4a49
font_01_sfnt_off0000777b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x777B 10408 bytes
SHA-256: c85966f6f3c2b9cad606bf711fd2bccf56e378356b5857bb8241e57356a953a7

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