Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f91d7e28f6f2609…

MALICIOUS

PDF

80.1 KB Created: 2020-12-17 20:00:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: bd33eb86bbabb3ce9028dd7a174f6d7e SHA-1: dc99fb208f15441f7ec6bcafe7213a086f8f3e81 SHA-256: 2f91d7e28f6f26094007f14ceb3c1912b3eef30665bd37351efd543f6288787e
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it contains a large number of external links, characteristic of a link farm. One of the embedded URLs, 'https://trafftec.ru/aws?utm_term=good+morning+photos++beautiful', is flagged as suspicious. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest an attempt to redirect users to potentially malicious content or for SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=good+morning+photos++beautiful PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426407/normal_5fc4f954de16e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371498/normal_5f9ea61f88657.pdfIn PDF document text
    • https://mizewipexu.weebly.com/uploads/1/3/4/6/134609608/xupokonewelozugolob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382618/normal_5fbb67437399e.pdfIn PDF document text
    • https://zejebamusij.weebly.com/uploads/1/3/2/3/132302936/tilitu-desufewogu-xoxesizewev.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/zalelowagus-duvelofeve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366964/normal_5f87825701233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386333/normal_5f8d133cc63c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378846/normal_5f91b21942a61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414871/normal_5fc501edf0586.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/19bf34eb-eb7e-47e4-9cc2-5bf47ca4f4f0/pokemon_altered_emerald_starters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a715a51-14ad-4ee0-8e75-e0947c8ea55a/orientaciones_selectividad_andalucia_2019_lengua.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/242b0721-309d-475c-b7de-f48cb386064a/11052684198.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ec90b4a-3c5a-4996-b38d-91246d18891f/88841184067.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaa0dd0d-bbf4-48a9-bc55-add058d04d30/33200894487.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7da28326-7344-4cfd-bfba-3b69e4678e7e/topibofuvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa2da5e5-8a6b-41fd-a3e3-fd6e4e6bcbbe/redstone_gate_hours.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE485 5624 bytes
SHA-256: 880b42f7501f47f84dcb6ec9c0864e532ab5cb5df0d6e724e2e0b460ee7a3b66
font_01_sfnt_off0000f773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF773 3652 bytes
SHA-256: ad03cb59778714d7dc4bd2da513b33c5b6ba7ddb90423dad33bc4abd21d59be7
font_02_sfnt_off00010599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10599 11232 bytes
SHA-256: cff7821ebf0b27c024264b988e48f9e553bf3b212633912f5ad94b894fd67f3a
font_03_sfnt_off00012b8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B8F 1736 bytes
SHA-256: 551918360585b1590efa6fd2a215345b2f702067d151a0e4b48cfa7490b57960

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