Malicious PDF — malware analysis report

Static analysis result for SHA-256 d704d7f08e566650…

MALICIOUS

PDF

46.2 KB Created: 2020-11-06 19:49:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f6ff65157ecf2e9a5a65e0f51f09ea8f SHA-1: 34731b0f228146ab036009fcba986c7cd2637213 SHA-256: d704d7f08e56665099d6bbdac5c289a4d4c332e69a292e6a91de3474b1b2d680
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document exhibits characteristics of a link farm, containing numerous external links to other PDF files, many hosted on disposable domains. The document body includes a URL that appears to be a lure for "tv buddy android app" related content, suggesting a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffi.ru/123?keyword=tv+buddy+android+app PDF link annotation
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/fubamoxul.pdfIn PDF document text
    • https://fixasamajiwige.weebly.com/uploads/1/3/4/3/134318971/suxukaxezalexorixaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374373/normal_5f8a89f499ec4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371808/normal_5f89fbbaef4a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f88c49e3562d.pdfIn PDF document text
    • https://merigufut.weebly.com/uploads/1/3/4/3/134357701/monupexib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371543/normal_5f8c6593328e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5f8bcf432337e.pdfIn PDF document text
    • https://pebezudaxefen.weebly.com/uploads/1/3/4/3/134347708/nebidonodogugiwixovo.pdfIn PDF document text
    • https://rugurujumififez.weebly.com/uploads/1/3/1/3/131384765/afa549f7bed8fe6.pdfIn PDF document text
    • https://gijepeparo.weebly.com/uploads/1/3/4/3/134318767/e09fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382770/normal_5f9c0aab65142.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422368/normal_5fa422fa8cb68.pdfIn PDF document text
    • https://betoxugibujimiv.weebly.com/uploads/1/3/1/0/131071043/xenevis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372723/normal_5f977a31e5278.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://wetopego.files.wordpress.com/2020/11/birik.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_off000068f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68F1 4680 bytes
SHA-256: 4e4b99578f43653b660cc807b48348cc1048e5b2be3986ed875e3e6d1de5e329
font_01_sfnt_off000078cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78CD 10744 bytes
SHA-256: 92a30b8fd33fc37a1ea03e22922fd0c10a13d746eda042b57ba342ee90803e0b
font_02_sfnt_off00009d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D90 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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