Malicious PDF — malware analysis report

Static analysis result for SHA-256 13e276487520fa01…

MALICIOUS

PDF

46.7 KB Created: 2020-11-09 02:35:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 380461808e77e9aad0f99ea64b7d1b28 SHA-1: b82451471ab195e4f518ad75f0ac4b5edab90362 SHA-256: 13e276487520fa010e949dc11c99a7c5dc3a81e344f210f36eb0ef9608dabb01
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links and a document body referencing 'TD jobs apply online', directing users to a URL that acts as a link farm. This pattern is indicative of a phishing or scam attempt designed to lead users to potentially malicious content hosted on multiple domains. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://trafftec.ru/123?keyword=td+jobs+apply+online PDF link annotation
    • https://wokesije.weebly.com/uploads/1/3/4/5/134597961/tetegebe.pdfIn PDF document text
    • https://peketodofow.weebly.com/uploads/1/3/4/5/134589962/4080072.pdfIn PDF document text
    • https://morizuni.weebly.com/uploads/1/3/4/6/134606759/f3dab03a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393193/normal_5f8f642ca6cd4.pdfIn PDF document text
    • https://jurizimobijagi.weebly.com/uploads/1/3/0/8/130874317/muruxagisojevimix.pdfIn PDF document text
    • https://rilirali.weebly.com/uploads/1/3/4/2/134235358/af7f16b6fdb.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://uploads.strikinglycdn.com/files/d7fb4e3f-d016-41fc-9eb7-deb1837f1696/36527614594.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eee4e84d-f796-49f7-a11c-c9958cbefba7/9947635526.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/grokking_algorithms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9c7b8f1-b6e5-4367-bfde-34abf6b984dd/tavikexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa44b4e3-e390-4fb0-846b-543864de73dd/51915460041.pdfIn PDF document text
    • https://wobonil.files.wordpress.com/2020/11/genezirifimonazukafize.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/bread_and_buns_recipes.pdfIn PDF document text
    • https://nusonuna.files.wordpress.com/2020/11/kegawaxedopolafigugoni.pdfIn PDF document text
    • https://wisevojinu.files.wordpress.com/2020/11/lababazagijoxixexelufogal.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_off00006b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B72 4832 bytes
SHA-256: ed149efc47d99c0a06ca2831e2ab48cef768e3ead637e574ca71b3b71ddbb7e8
font_01_sfnt_off00007be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE5 10600 bytes
SHA-256: f1c769cc15509a50609bf2fdf488c1573eb4b661e18e2111fd65a2c3148fefc9
font_02_sfnt_off00009fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FB7 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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