Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6471d155cf3899d…

MALICIOUS

PDF

70.2 KB Created: 2021-06-01 06:53:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63f83a12cccdd21dbc6e691f786be759 SHA-1: bd3b1cd971043205a2f7baef5353190adf5e86f5 SHA-256: d6471d155cf3899dbbe1273bc0d0d2e62a04cb782de2e2bbb76d3c824b9cf85b
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous external links, with the primary one being 'https://ketchas.ru/pbw?utm_term=how+to+fix+black+and+decker+toaster', suggesting a phishing or malware distribution lure. The heuristic 'PDF_SEO_LINK_FARM' further supports the idea that the document is designed to drive traffic to external sites, potentially for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ketchas.ru/pbw?utm_term=how+to+fix+black+and+decker+toaster
    • https://cdn-cms.f-static.net/uploads/4378390/normal_601bc23e4f79f.pdf
    • https://cdn-cms.f-static.net/uploads/4424683/normal_6064c88dc8c9c.pdf
    • https://cdn-cms.f-static.net/uploads/4504922/normal_60559052a9d39.pdf
    • https://gusemotasejodab.weebly.com/uploads/1/3/2/7/132741535/4c822bf1bdb.pdf
    • https://static.s123-cdn-static.com/uploads/4425229/normal_5ff65245e2e02.pdf
    • https://static.s123-cdn-static.com/uploads/4492897/normal_5ff6923867a53.pdf
    • https://paparudedolenod.weebly.com/uploads/1/3/4/6/134686514/sivomogomitu.pdf
    • https://static.s123-cdn-static-d.com/uploads/4374838/normal_60afef96162e9.pdf
    • https://cdn-cms.f-static.net/uploads/4387581/normal_6043eaf08ab2a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/06b8624b-47eb-494e-a3b5-cf5f6ac764b5/suena_third_edition_answers.pdf
    • https://uploads.strikinglycdn.com/files/67e164eb-26a5-4c92-b7d8-58955154964a/baofeng_chirp_radio_did_not_respond.pdf
    • https://uploads.strikinglycdn.com/files/e08e376d-afc8-4f39-a0b9-1a451f80598e/1333977654.pdf
    • https://uploads.strikinglycdn.com/files/a038e61c-131a-42c2-8305-78dfa4226a6c/45018806946.pdf
    • https://uploads.strikinglycdn.com/files/9274fee4-5ac3-4a39-985e-26eb37a2746f/14408952647.pdf
    • https://uploads.strikinglycdn.com/files/95cc772e-5032-476c-944b-40c3baec0a0e/the_veldt_by_ray_bradbury_characters.pdf
    • https://uploads.strikinglycdn.com/files/ac477420-9f1a-43f8-8677-7e216e0cb8b0/17428245139.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d482.bin
e83e710b67da10592df3d15b666bfe1361690cef8cc0546b59210777f8c22898		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD482 5340 bytes
font_01_sfnt_off0000e6cf.bin
4c73083e3f0002b2c3aa609256d3df12976d29f858ffdd0a02ab8b30b1bb971a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CF 10892 bytes

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