Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1008f8e797f0f77…

MALICIOUS

PDF

68.5 KB Created: 2021-05-28 13:36:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e74b440d9f9d53626693407e815c0425 SHA-1: 48a529a5412ab720172d8ca3071d017b49b1df11 SHA-256: c1008f8e797f0f779f9ead7ec37eb4eca0651f38e335b23d289cd5f4adfc11c2
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, including one to 'ponafet.ru', suggesting a phishing or link-farming attempt. ClamAV and ML classifiers identified the file as malicious, specifically a phishing trojan. The presence of embedded links and the overall structure indicate an attempt to direct users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/strik?utm_term=how+to+write+a+coffee+shop+business+plan PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4382192/normal_5ff6052d4d22b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496404/normal_602c8304a597f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388407/normal_60390552388d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369664/normal_605f7e0472e5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505358/normal_5ff2043c3b541.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412583/normal_606a107aac0d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407299/normal_5fee44508a6ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498324/normal_6004a645ecb0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380525/normal_606e2f90da3d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374980/normal_6050bb0687f53.pdfIn PDF document text
    • https://sumejuloluguwir.weebly.com/uploads/1/3/5/3/135390827/fupikexefi-xusesuginiz-dilut.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4389824/normal_60aff4abd95e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404112/normal_601b29a8007bf.pdfIn PDF document text
    • https://ritesevegozuvij.weebly.com/uploads/1/3/1/6/131606822/futomupito_waxekobaf_fasimedir_sugotizufowoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ba341fa-c15f-4d26-b666-fe2d406891f5/spider_man_ps4_freedom_tower.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57c0f18c-f35d-4b11-9540-023d7bc4beb4/how_many_episodes_of_food_wars_are_there.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/796fcabd-ae28-4db7-b929-7fcbbfdd6534/delta_q_charger_hf_pfc_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/346ed5d8-aeb0-4b3b-9cac-e41d23b01577/lunepebosexowamipetasise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/375b5c23-b2e4-45f2-b80a-31292b7d493d/13054041658.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25fe233a-1a12-45b6-a87e-72743b7791ee/tirikonenasu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14443b93-1f9f-47f1-9237-508ffd58a482/stc_500gb_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95c7c16d-1fa0-4709-acde-77a82a7f50ea/how_to_respond_to_breach_of_contract_lawsuit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4de4b16-7bd9-4fb8-a912-bfda67a30dd4/bushnell_northstar_telescope.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_off0000d1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B3 5296 bytes
SHA-256: f99272227bbdb6fd673ce5849913ec4109c718a13b5ab8aa7ad061a272352e81
font_01_sfnt_off0000e3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BD 9548 bytes
SHA-256: 8f06c3a27d07e21114932e81bba9e0fb64d7ca3cb137b5f75b57aaf87fac6577