Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff410ab28f29c6c0…

MALICIOUS

PDF

81.0 KB Created: 2021-03-26 08:30:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 1518fcd2a30c1bb6da572dfcbb69efbf SHA-1: 936931129a8a46d082b3e72af6fe85b5ff49c309 SHA-256: ff410ab28f29c6c082f1852143cb560c4dff087edb98c866d9f3904c98e9fea2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, a common tactic for SEO link farms or phishing campaigns. One prominent URL, 'https://leonvi.ru/wix?keyword=legendary+sports+names+word+whizzle+answers', suggests a lure to a potentially malicious website. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=legendary+sports+names+word+whizzle+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470979/normal_5fcf1269141ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490141/normal_5fc8dea5a874e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374536/normal_5fd8e268c0a98.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466367/normal_5fe594a740d80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487382/normal_5ff9bf7bd407a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450337/normal_5fe852f790afb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444853/normal_604ed3a50a614.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8569cc17-8b2a-4187-ace0-95b0550b99f0.filesusr.com/ugd/d6eede_102a923877274f56995e60378c087941.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/15690855280.pdfIn PDF document text
    • https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_fb22ec1087274badbe7d4be42c46bd9c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5881dd57-b197-465d-9f09-8b03e6f2aa8d/zabimopetisuvizagarusoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/what_is_the_holy_spirit_of_god.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/dexepinupiwirikabefu.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/furozugus.pdfIn PDF document text
    • https://ef4b221f-cfb4-47e8-bf1d-3b5092770df7.filesusr.com/ugd/4948da_8953990ac96146b084012fb447781979.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/hydra_brute_force_free.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/blade_and_soul_soul_fighter_guide_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/656c892c-61c7-4c05-9683-40901e60d2dc/51578487730.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/articulacin_de_codo.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/76164826420.pdfIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_16f5481425cf44a2aa29a8d7d663840b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/whirlwind_axe_quest_guide_horde.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9930c07-8fcb-496f-a34b-e90154c2a586/how_to_create_a_database_form_in_wordpress.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_off0000f66d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66D 5560 bytes
SHA-256: ec5ce029485a057a079ca2281954ac0f89d02670592865f0adc3438f81557da3
font_01_sfnt_off00010952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10952 13652 bytes
SHA-256: 45793a6e2c92ef4f5947ad228750bc10fea08a93dbcacbff76f83c37f85e548d

Open this report in the interactive analyzer, or submit your own file for analysis.