Malicious PDF — malware analysis report

Static analysis result for SHA-256 9619a80aedd952ab…

MALICIOUS

PDF

65.9 KB Created: 2020-11-24 20:40:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 248575b06b383a137ba78a9e60729a9f SHA-1: 021e5e74c607901b6c42a9e5c285e05fec32b79e SHA-256: 9619a80aedd952ab95d4b453c2193f5a460ca6f861ebdc23cfe40bd63154de1e
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 0.9998

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://traffking.ru/strik?utm_term=python+transpose+sparse+matrix PDF link annotation
    • https://kifenefaru.weebly.com/uploads/1/3/4/3/134327755/5383730.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/roware/47329478664.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44abeefb-7d8d-414c-a778-c008b9bd36e9/un_secret_philippe_grimbert.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6e1f12e-c82d-4011-8f25-87492aa18cd4/jabumizojipuperigefisuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83f05229-6f53-427c-b75d-cea4d99cedae/lijowujimezikiniwasaka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cdfd365-cbf8-47e3-843b-d07fd7c23ce0/dizeluzijar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc9038d1-748a-4f57-946b-2f599a32a30b/61784613049.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/hobbs_and_shaw_full_movie_free_stream.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc1bea4a-5868-4091-b92b-de636cbe2bb0/77141048022.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09e6786a-772a-4ce3-bc20-2b9732fff861/are_electrons_fast_moving_particles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2046d043-80ad-4377-8c39-681d712cadb3/56342816454.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e88ab5-738e-4d14-96aa-1de591529fc7/40370370344.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_off0000c4fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4FE 5200 bytes
SHA-256: a3910a04f4e1b9c29f9919a825bdc84e9cee93a8d83d733f0fe1553d28273341
font_01_sfnt_off0000d689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD689 10844 bytes
SHA-256: 83857dea8518a93c99dc94ef21cf56ac7eb3e57821627c9c9e83d69852dfaed3