Malicious PDF — malware analysis report

Static analysis result for SHA-256 a061da543bb64783…

MALICIOUS

PDF

85.0 KB Created: 2021-04-03 07:19:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1a80f2b6b88e0635a108200a16f70c2 SHA-1: 8088d109f4a53f9e8aed346ee17e5e82d493b2b6 SHA-256: a061da543bb64783ebdbb89208b1bd4fe9de2319e0f0d9eca1e3eaddfc726ed5
96 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary URL pointing to a site that appears to be part of an SEO link farm. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs suggests an attempt to redirect users to potentially harmful content. While no scripts were directly extracted, the PDF structure and heuristic firings point towards a malicious document designed to drive traffic or host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/wix?keyword=los+frutos+del+esp%25C3%25ADritu+santo+versiculo
    • https://bizunasudene.weebly.com/uploads/1/3/5/3/135345394/fudurisas-nopilepuvo.pdf
    • https://gaxuzuwe.weebly.com/uploads/1/3/1/8/131871814/wilatipewarifom.pdf
    • https://sokirokesavosa.weebly.com/uploads/1/3/4/9/134901907/44c9a84e1.pdf
    • https://sizamuvexiluti.weebly.com/uploads/1/3/4/6/134644091/e94ae3535.pdf
    • https://vipozuguru.weebly.com/uploads/1/3/1/4/131483083/xakawewetopa_rubojo_lowanu.pdf
    • https://zudovizu.weebly.com/uploads/1/3/4/3/134338339/rawarawukije.pdf
    • https://kunimagim.weebly.com/uploads/1/3/4/6/134608209/d11a059cbc93e28.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fb5b3b17-6e6a-47c5-ae49-26eddba71e57.filesusr.com/ugd/aff7be_a1844207fbcf42f9ad11703655449377.pdf?index=true
    • https://uploads.strikinglycdn.com/files/70ac4e0a-422a-4151-b63d-6a6af9d4d959/7702143875.pdf
    • https://uploads.strikinglycdn.com/files/466b5751-c823-4049-b7c1-45cc8799218e/43584803375.pdf
    • https://uploads.strikinglycdn.com/files/3f808f95-dd75-491c-9e65-ed49c28014ca/samsung_bd-p1590_remote_app.pdf
    • https://ebd73b9a-b255-48a5-b781-2bd84b483b4c.filesusr.com/ugd/956c05_732162aa74114ffabee9e5d48b518520.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e09f1ad5-5214-48b2-9ce5-c7d2cbb7e1f8/the_long_haul_rodrick_funny_moments.pdf
    • https://s3.amazonaws.com/bifadiwuwileji/gold_gym_trainer_410_treadmill_incline_not_working.pdf
    • https://69c5641f-197a-42c1-bef1-daa502c1f1d7.filesusr.com/ugd/948cea_d99ca2bd4290454cae3d5484db8fa529.pdf?index=true
    • https://s3.amazonaws.com/fogibi/wafozamisugor.pdf
    • https://uploads.strikinglycdn.com/files/909763b0-7745-41aa-bc75-0925f67bd179/vovukanaviwimaxun.pdf
    • https://s3.amazonaws.com/jefazaxal/examiners_report_2019_edexcel.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b95.bin
df01400e13fb75ad597fec2ceae6229af3e709c58244f43392708fcbd7497e79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B95 5204 bytes
font_01_sfnt_off00011d69.bin
b89c68b4dba1ef767c0416c0e6ff1c0f6b2d059c057a32ffad732c04dbccd50e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D69 12084 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.