Malicious PDF — malware analysis report

Static analysis result for SHA-256 2175d3fa84fb27f1…

MALICIOUS

PDF

45.7 KB Created: 2020-11-09 15:43:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25df8faad8d0be05d1df2e04e3a52c08 SHA-1: 539da5fdfd694f6a32a6b36f39b8536c071c9b24 SHA-256: 2175d3fa84fb27f163a03becec4cb82793a468b5d3bb872d06a866e3f5cdd76d
96 Risk Score

Malware Insights

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

This PDF file was identified as malicious by an ML classifier and contains a large number of external links, characteristic of a link farm. The document body, though heavily obfuscated, contains a URL that appears to be part of this link farm. The presence of numerous external links suggests an attempt to manipulate search engine results or redirect users to potentially harmful websites.

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=vitality+bowls+dallas
    • https://digufotunu.weebly.com/uploads/1/3/4/2/134266503/ebf6c7b30edb9.pdf
    • https://mesedegusi.weebly.com/uploads/1/3/4/6/134600151/42605d5.pdf
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/2b7f84.pdf
    • https://cdn-cms.f-static.net/uploads/4373248/normal_5fa0bca53a736.pdf
    • https://zulatikuwa.weebly.com/uploads/1/3/0/7/130776211/4094919.pdf
    • https://kiroteveve.weebly.com/uploads/1/3/4/3/134378898/2791704.pdf
    • https://cdn-cms.f-static.net/uploads/4411931/normal_5f9b5563cc3a0.pdf
    • https://lokixesope.weebly.com/uploads/1/3/1/6/131607163/suxodegatiresa-bafuf-ninixut-kopumavinujar.pdf
    • https://xironudobavus.weebly.com/uploads/1/3/4/4/134461104/3947255.pdf
    • https://jijelejo.weebly.com/uploads/1/3/4/5/134590633/5264621.pdf
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/nixobisad-denurasuke-sadomos-jixovireziwevak.pdf
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/665c0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/0ddb28d5-d05f-4968-83a7-55f26f6566db/48514517481.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006664.bin
1cb58b43b1f14cf28cc83dfee6e63175a93961831ec998e63a5c302bd155f5c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6664 4584 bytes
font_01_sfnt_off00007609.bin
979464818a9adc0a80cd88eee193240fba636b4240ce80c52a604d083524bc12
pdf-font-stream PDF embedded font (sfnt) at offset 0x7609 10700 bytes
font_02_sfnt_off00009a4e.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A4E 4324 bytes