Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b088191b97630fd…

MALICIOUS

PDF

40.5 KB Created: 2020-11-08 10:26:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ccee4309560513dbfeb95f3485a22b85 SHA-1: df15e631359dca47cfd394c3bd6e86e779b6027c SHA-256: 6b088191b97630fdb01cf0e9d8bad58991cb5bffde37745a7c6ea17202023f35
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://traffset.ru/123?keyword=roomba+560+manual+pdf PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/98577b1e-d1a5-422e-9b17-86670047c195/41393869337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a98188b3-65a5-489c-91f6-07b9a47348f1/vokajik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25441a26-b331-4d31-9eb4-30bdbc6d8189/rigit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbb62a0b-d363-4344-b3c3-6de06ac60dfe/mckinsey_problem_solving_test_download.pdfIn PDF document text
    • https://wetijagavur.files.wordpress.com/2020/11/desarrollo_plantular_zea_mays.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03ccb532-5ed6-4012-b80a-ade02d044d42/auto_booster_amazon.pdfIn PDF document text
    • https://farujigorile.files.wordpress.com/2020/11/charas_movie_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/32626993271.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f9c2a0f-f5d0-4182-a882-fb5bffbb6484/papa_joes_games.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/gofijure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dab2f6e-9e73-4c2b-afea-1dd921366eb4/kuwerimobutenofewona.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/what_are_the_benefits_of_industrialization.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/64793756310.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_off00005e7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7D 5480 bytes
SHA-256: 44bfc871674170d01ffd9b2afb6dbd07a3792cf6b285df047bc031aea696ff66
font_01_sfnt_off00007115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7115 10788 bytes
SHA-256: 09368de555e2730908ffe168319137f8ff913cbfaf28c5954cdfada0fcf26288