Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e5ebe3a5b9fc6d…

MALICIOUS

PDF

42.7 KB Created: 2020-11-07 16:58:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90687e9a43082dba9b2baef219623f9f SHA-1: 4a2c0c19f20b0b8cdc8edb1cdf45abd88bc26e1c SHA-256: 03e5ebe3a5b9fc6d46e0cd3afd19330b95dd164dc5cf0d9ac41a8a0c897fce9e
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL, https://traffnew.ru/123?keyword=kenmore+elite+dishwasher+model+665+manual, suggests a potential lure for users searching for specific product manuals. The presence of numerous Weebly and Strikingly hosted PDF links indicates a coordinated effort to redirect traffic or distribute content, possibly malicious. While no scripts were explicitly extracted, the structure and heuristics strongly suggest an attempt to manipulate search engine results or lead users to malicious sites.

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://traffnew.ru/123?keyword=kenmore+elite+dishwasher+model+665+manual
    • https://pudukodup.weebly.com/uploads/1/3/1/4/131407572/8643958.pdf
    • https://vupimolafi.weebly.com/uploads/1/3/1/3/131398504/34df368c5720.pdf
    • https://cdn-cms.f-static.net/uploads/4367268/normal_5f8755c8934ec.pdf
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/nejalabobuxirije.pdf
    • https://cdn-cms.f-static.net/uploads/4375196/normal_5f89e1fc7dcf9.pdf
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/tubafawez.pdf
    • https://vodiwisilob.weebly.com/uploads/1/3/2/6/132681054/2597280.pdf
    • https://nugekepujipa.weebly.com/uploads/1/3/4/3/134318644/5882038.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/kabisebax/chin_interactive_investigator_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/53610110-7636-4b97-a27f-79a51b97cd6b/2149363146.pdf
    • https://uploads.strikinglycdn.com/files/048386d1-bb33-40e1-965c-86796e61a582/19200562659.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_off000056ca.bin
4e5983eb1897bee3848eea3d5e9af0b8d840e052679b87d6439e787da2c0b616
pdf-font-stream PDF embedded font (sfnt) at offset 0x56CA 5284 bytes
font_01_sfnt_off000068a5.bin
b5be230b3b0f04d1d73d681d634423f0fb32efa3cec2619f376980b73468b443
pdf-font-stream PDF embedded font (sfnt) at offset 0x68A5 11916 bytes
font_02_sfnt_off00008e45.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E45 4324 bytes