Malicious PDF — malware analysis report

Static analysis result for SHA-256 abab17b607ab2a1b…

MALICIOUS

PDF

72.4 KB Created: 2020-11-29 16:05:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 2ea1c40ffcc63f6a3a64f938c828a5da SHA-1: d121fa19b85b3dc5a13e5fafedc984ac408aa5dc SHA-256: abab17b607ab2a1b90d37380a6789caf4fe50d95a244d6b4df79e14c18fac534
96 Risk Score

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 0.9997

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://trafffe.ru/strik?utm_term=borderlands+2+badass+tokens+best+use PDF link annotation
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/51ad8eeff7fa53.pdfIn PDF document text
    • https://tuwebiparixe.weebly.com/uploads/1/3/4/6/134674666/65731c4b819a5ac.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/a586c39e-d1b5-4ae7-b50f-f59f135266e6/tomato_under_microscope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d9a346f-b8e3-45a4-8611-1a1ecfd61390/17411853171.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/cheating_man_meme_format.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/89903607780.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/rapid_sand_filtration_process.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/25408120820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bb8fffd-579e-4b62-a582-c3be20610fb0/frozen_watch_online_india.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/pocket_mortys_morty_games_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/20504647246.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae0fd734-9a6b-4278-b391-dc77c63e97c7/gezugedivigivavasigubeme.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8F 5204 bytes
SHA-256: f03b63ffa5710c2922b48d6930d80d8c04da9107ab9b0757f453edaf0f2e29c1
font_01_sfnt_off0000ec4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4C 12344 bytes
SHA-256: 5aa94dfdde7ae6f0ff09a3a79b7a50f4a324a5bb21fba8d4dfd5f408267c91ee