Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd0885e07a6145d9…

MALICIOUS

PDF

52.7 KB Created: 2020-10-31 04:22:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: bc5435aa81808d7e5c03f5d24f6e8da2 SHA-1: cb113ab638f109dc2705055e6ead542b203f7bd6 SHA-256: bd0885e07a6145d96e11d72640c221474b2778ee5944d07dce5a79748b7ff13b
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://ttraff.me/pify?keyword=physics+for+dummies+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370288/normal_5f8eab052a4b6.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/rafumopujakebi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412164/normal_5f983f3781f30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377113/normal_5f8bbcb340d57.pdfIn PDF document text
    • https://zuwumepegowivos.weebly.com/uploads/1/3/1/0/131069935/7f60432723aa63d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366400/normal_5f9428f09c925.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377403/normal_5f8ec2a53a09f.pdfIn PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/8008187.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/tugekewekuzefelux.pdfIn PDF document text
    • https://tejojapifofomo.weebly.com/uploads/1/3/4/3/134339563/sigaromoxaxalopubub.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/tetazino/kagalokipibesofe.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/norgren_pneumatic_cylinder_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2281/9233/files/88451365544.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8242/4215/files/kenneth_wuest_word_studies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1855/0937/files/the_american_industrial_revolution_worksheet_answers.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_off000082d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82D4 4952 bytes
SHA-256: 9820a8d999e3a6f374e80965fb5e4d1657467c6713b5561113db604ca05a4290
font_01_sfnt_off000093a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93A5 10720 bytes
SHA-256: 8d51b22393fde7bfb9f99b57a1d5a8739b5ec66f796f8821e3e067649c50d8df
font_02_sfnt_off0000b797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB797 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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