Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddb6262aa188046e…

MALICIOUS

PDF

44.9 KB Created: 2020-11-07 01:42:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ec8dbe71efca43ffe06ab6b033022598 SHA-1: bb0756fa168398b549ec5d77fcc70667868a84fd SHA-256: ddb6262aa188046e93282516ae43ad095c008fd25177723f1ac4ae2d23a2d271
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of external links, identified as a link farm, which is a common tactic for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. While no scripts were extracted, the presence of numerous external URLs suggests an attempt to lead the user to a compromised or malicious resource.

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://traffset.ru/aws?keyword=seaweed+snacks+keto PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380539/normal_5f957ae95c44a.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/3222900.pdfIn PDF document text
    • https://kakezilek.weebly.com/uploads/1/3/4/4/134401463/4809758.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/piradi/rochester_elementary_school.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/zofejigigojama.pdfIn PDF document text
    • https://felibule.files.wordpress.com/2020/11/povunikilelivu.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/38028024318.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/michelin_primacy_mxv4_215_55r17_94v_tire.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/ice_cream_truck_for_sale_nc.pdfIn PDF document text
    • https://goresab.files.wordpress.com/2020/11/54381570989.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/wasuxaxetaperalor.pdfIn PDF document text
    • https://dudasituwet.files.wordpress.com/2020/11/2008_jeep_patriot_fuse_manual.pdfIn PDF document text
    • https://nazoteviv.files.wordpress.com/2020/11/29426992894.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_off000071b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71B8 5064 bytes
SHA-256: 5aebd1472822b0aeaa75ab3e8285dc6277579d772effcea15fb89b500977674a
font_01_sfnt_off00008322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8322 10548 bytes
SHA-256: a66dbce3f82045ab7c8aca298253b3308317d2bfe1a6be1922590f60c6fe278f