Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fe45141172f3a24…

MALICIOUS

PDF

42.8 KB Created: 2020-11-08 18:22:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 645a78fffbf276202b838d1d57f041f5 SHA-1: bf3dc4a4876f8479e908f3f3fcafd44b18d93290 SHA-256: 3fe45141172f3a24194a0ef51f05b44d92a9ab2edb1414dc56e5f6baba8d7821
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to potentially malicious or SEO-manipulating domains. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a tactic to artificially inflate search engine rankings or distribute traffic. The presence of a URL related to 'mod apk' and the general nature of the links suggest a lure to potentially unwanted or malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://trafffe.ru/123?keyword=choices+mod+apk+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375894/normal_5fa7f3cf315e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5f8803fbda51b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369763/normal_5f9de18b08980.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://rakixopemima.files.wordpress.com/2020/11/25103306447.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c15bc04-34bf-4d08-ac69-c97dfa2ae0cb/functional_medicine_matrix_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50a895d4-7f50-4532-9560-56002772624d/84035482064.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/makalah_abortus_inkomplit.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/72835989732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dcdcd3f-46a8-46d8-95a4-36e5111cc80a/sole_e25_elliptical_review.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/barnyard_the_original_party_animals_characters.pdfIn PDF document text
    • https://miwepuwo.files.wordpress.com/2020/11/93218214033.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/fidubokozepuk.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5839 3108 bytes
SHA-256: 1e5e8670daf83ff111d333c5b9291516e13ca0168aa72213001944a5252ef10d
font_01_sfnt_off00006368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6368 5636 bytes
SHA-256: 0fae6d503cae7fecbe3f0568f8dd96484e86ba5b3c17ead18c33cbbdfa89a6a7
font_02_sfnt_off00007667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7667 13124 bytes
SHA-256: 05b729e28a7e00268a271778e98e6a6a53230fb654cfd3d49c292e528eecaca1

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