Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d5c68122527151…

MALICIOUS

PDF

36.2 KB Created: 2020-11-09 04:31:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ebfb44a27e9ceaec1b218ded8fbda45b SHA-1: dbb3cbd3efce455e63063dc1e480b72dc5899f0a SHA-256: e7d5c68122527151c3c3ec67594832daf1a58c5b2de314adc252607e09900581
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 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://trafffe.ru/123?keyword=nampa+school+district+calendar+2019-20 PDF link annotation
    • https://jepupuwupojuv.weebly.com/uploads/1/3/4/4/134481076/gopijegezu.pdfIn PDF document text
    • https://sosegesidor.weebly.com/uploads/1/3/4/4/134465043/duvitodumabop_tosev_vobulewajejeg.pdfIn PDF document text
    • https://pimetagedipimop.weebly.com/uploads/1/3/1/6/131636886/57dc2c19170a.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/7885719.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/016f7239-5e6a-453d-b975-3bf5688a51e1/dirt_devil_breeze_vacuum_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/benekibofivirarajav.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/payment_request_letter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6505c861-9244-457e-9b3e-91f9fef80bfb/kuwikixiruwonamine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f646a02-93f1-4a18-8d1e-916dfd005718/lepanomibesolibuxe.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/the_sine_and_cosine_rule_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/wunog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1b845a8-0a37-44d9-a49d-dbbdcbaefad9/61571586981.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_off00004ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4ED7 5796 bytes
SHA-256: cff669152b38b40948d6bdb0a770a761771b0a821dd1bd8bbabb3f19b0dc0532
font_01_sfnt_off00006269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6269 9920 bytes
SHA-256: 001a6c9e7c6fd7a3da5e23d8b01d6007f8afb2a828ba260d4c759024848486c0