Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68b8879ad6e118a…

MALICIOUS

PDF

53.6 KB Created: 2020-11-09 09:46:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 44150fe0a713cfb52a7d3d3fb086e5ff SHA-1: 273b7337a941323ca61042c5024b1aa3e1e52fb8 SHA-256: b68b8879ad6e118a5e62378f6953f72a92eb29829b5398a4f6c46fa21e48b1f9
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://traffine.ru/123?keyword=glscrip+retailer+list PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369491/normal_5f8bbff6b04e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368964/normal_5f9d30f138a4f.pdfIn PDF document text
    • https://bidutujube.weebly.com/uploads/1/3/4/4/134403342/2041430.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405903/normal_5f960501e2c33.pdfIn PDF document text
    • https://jezosodakadofa.weebly.com/uploads/1/3/4/3/134376186/vusaxedisim_nugoxaxavadulew_bagobikizoriw_lajoziwuxore.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/1867598.pdfIn PDF document text
    • https://terarawuterojuz.weebly.com/uploads/1/3/0/7/130739827/2c24077adcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370317/normal_5f8d46c04ae1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481065/normal_5fa7486444a44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413345/normal_5fa76ba7bd41a.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/d6497bc6-3a9a-412c-be6c-08f6ac27d124/govel.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Related samples 8

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_off0000891d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x891D 4960 bytes
SHA-256: badb23407a51944d821388ff23a6c7fe7831ad79aa7fbd738932117c3cefdf32
font_01_sfnt_off00009a0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A0B 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off0000a56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA56F 10508 bytes
SHA-256: 36141d08e6855e9866ee01d08683e2f686f8d2af80759993b7e4b28c87eb3af7

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