Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dd911f91c447470…

MALICIOUS

PDF

79.2 KB Created: 2021-05-11 17:10:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 057bbbb59a048165549260d1818f3c14 SHA-1: df724f1c73d8e0496fe304382a6c24eb9ab3fe75 SHA-256: 5dd911f91c447470e15dd218a4f21aaf2d176aef41438dcbf47941f2950c2b8c
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a large number of external links, indicating a potential link farm or redirection scheme. One of the embedded URLs, 'https://ponafet.ru/strik?utm_term=is+queen+of+shadows+on+hulu', is a primary indicator of malicious activity. While no scripts were directly extracted, the PDF structure and the presence of numerous external links suggest an attempt to lure users to potentially harmful content, aligning with spearphishing tactics.

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://ponafet.ru/strik?utm_term=is+queen+of+shadows+on+hulu
    • https://cdn-cms.f-static.net/uploads/4473902/normal_5fe87a8782000.pdf
    • https://cdn-cms.f-static.net/uploads/4381964/normal_606da41d06333.pdf
    • https://wofovado.weebly.com/uploads/1/3/1/8/131871653/585363.pdf
    • http://xapidomin.mywebcommunity.org/76273751470.pdf
    • https://gakefutafo.weebly.com/uploads/1/3/0/7/130739004/tepanupavali.pdf
    • http://tadugebakonuged.getenjoyment.net/almanca_renmek_iin.pdf
    • https://sajulivos.weebly.com/uploads/1/3/1/1/131164476/29256d.pdf
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/pefexugedinaku.pdf
    • https://gejowarog.weebly.com/uploads/1/3/2/7/132740172/siwaxenamita-tivilunaxovuxo-zenurelalo-fovigutukinun.pdf
    • https://cdn-cms.f-static.net/uploads/4383322/normal_5fe6c2d797d3e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/53acdaaf-7c86-4d66-afee-76a015480998/15870127926.pdf
    • https://uploads.strikinglycdn.com/files/3d7f52e3-92bd-470d-8981-aa97416cd982/lct_208cc_engine_specs.pdf
    • http://bilisedutave.myartsonline.com/slow_cooker_recipes_uk.pdf
    • https://uploads.strikinglycdn.com/files/1f47bbcc-b869-45a8-bcdb-577fa9be374e/silica_polarity_index.pdf
    • https://uploads.strikinglycdn.com/files/80a1200d-f906-48aa-bf99-dc889abd1f9a/where_to_buy_frigidaire_stove_parts.pdf
    • https://uploads.strikinglycdn.com/files/b9cde901-2dc3-4aec-8265-c39edc413b61/1726942327.pdf
    • https://uploads.strikinglycdn.com/files/88a934dd-b458-40eb-a91d-d9f3354e0bcf/41483913618.pdf
    • https://uploads.strikinglycdn.com/files/924c7151-5908-4189-90f8-331045681abb/13801146569.pdf
    • https://uploads.strikinglycdn.com/files/a738d3d5-4a54-42f7-a7ee-f2aa105d4341/proper_nouns_worksheet_2nd_grade.pdf
    • https://uploads.strikinglycdn.com/files/488426c5-98ed-4681-b1ad-ff678041cf97/metal_gear_solid_3_snake_eater_pcsx2_pnach.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e71e.bin
1f7f1c2ff7633da220a11b9eee2aee83bc4200e8447ca4df7e519792992e1018
pdf-font-stream PDF embedded font (sfnt) at offset 0xE71E 4808 bytes
font_01_sfnt_off0000f776.bin
43987430373bac1334e4bd0d7bba5e01b28e1e278bcabe4edd4cab741d7ecee0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF776 12736 bytes
font_02_sfnt_off00011ffb.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FFB 4324 bytes