Malicious PDF — malware analysis report

Static analysis result for SHA-256 3df829a649f2cd25…

MALICIOUS

PDF

33.3 KB Created: 2020-11-05 18:05:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 96deec3474ae518869dabdcc5ff05b79 SHA-1: ddc88626343f1b2248ff1d7248850a4cd867af7a SHA-256: 3df829a649f2cd255141b9b85c6972d4a98cbd14d6d432e372d82151724fb1da
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafftec.ru/123?keyword=josh+hallmark+podcast PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390373/normal_5f984345eb273.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371495/normal_5f8ff97eb3061.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382619/normal_5f94680ecf96c.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/9956511.pdfIn PDF document text
    • https://terarawuterojuz.weebly.com/uploads/1/3/0/7/130739827/ponuzeligax.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/9d9610cc85aa5ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f8a0d913290e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_5f8726e27d961.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_5f87697d528b7.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/9582d9d5-c1c1-4677-8fd0-df568b4dc2f4/superdry_size_guide_hoodies.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/12684843380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff6433b9-0ef8-4f19-a019-2420792a1b23/24655513781.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/how_to_make_a_document_look_like_a_book.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_off0000439e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x439E 5368 bytes
SHA-256: 617021240ad2ab8661711ec9193291eab99bbbb8833bccead0d8336174eb4f34
font_01_sfnt_off000055b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55B0 10264 bytes
SHA-256: 3a39cf355eb4e0091e9d4de969f604b7d95bd395e89770a32e09774a0ce39605

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