Malicious PDF — malware analysis report

Static analysis result for SHA-256 a800cf876493446a…

MALICIOUS

PDF

78.2 KB Created: 2020-11-14 18:46:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: eb4492f2c756b5535c8b6a4b1653b0f3 SHA-1: dbbd19b26d2800170c43642a87a6674d65eb0b89 SHA-256: a800cf876493446a9bd553e8b2140767a777a5588f50aeafe35fe75c7b028f14
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://trafffe.ru/strik?utm_term=lost+in+dreams+dragon+age+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384825/normal_5f902dd3763db.pdfIn PDF document text
    • https://jazezuko.weebly.com/uploads/1/3/4/3/134389352/fb1f015fc9fceee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403128/normal_5f9d7e8b8d799.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405953/normal_5f98e46e1367c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389576/normal_5fade15006a08.pdfIn PDF document text
    • https://ginefudev.weebly.com/uploads/1/3/4/4/134454890/1ed28e6c5b9d4.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/zesotat/nwea_map_scores_2020_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/sownictwo_poziom_b2_angielski.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/29146580405.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d1152b4-23d0-4fbe-9de1-5ff4f21791e7/96589372463.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/law_of_moses_vs_law_of_god.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd980477-f741-484e-928a-7ca494072e2c/aste_di_auto_depoca_perth_wa.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/overwatch_aimbot_free_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/online_learning_platforms_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/telecharger_attestation_pole_emploi_cesu.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_off0000f4bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BF 5056 bytes
SHA-256: 8cd792cadb82e22cb1d32b9601eef44795f9fea00be8771b4ed830156230625d
font_01_sfnt_off000105da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DA 11160 bytes
SHA-256: c4d67ffce0ee6633c54fe9aac88c5958f6dec10659d67467c81a614d739e0bb6