Malicious PDF — malware analysis report

Static analysis result for SHA-256 82afdda129087bc1…

MALICIOUS

PDF

78.5 KB Created: 2020-12-25 00:00:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1658e657ea4b16949a3d726491c66b07 SHA-1: 1b2cda69d19a61e8fba561b3de5343d2d6094884 SHA-256: 82afdda129087bc13acb9a0205cfe8f4ee0e5a9a228cfc6d3fc5150d86c11f50
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was identified as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure and a PDF link farm. The ML classifier also strongly indicated maliciousness. The document likely serves as a lure, directing users to external sites that host further malicious content or phishing pages. No scripts were extracted, but the presence of numerous outbound links suggests an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/123?utm_term=imperialism+study+guide+questions+and+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370288/normal_5fd2d0b10ab6d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426267/normal_5fe23f762400b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386621/normal_5f909a58f0b6b.pdfIn PDF document text
    • https://dopijixofovaje.weebly.com/uploads/1/3/4/6/134692352/844646b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367922/normal_5fb35b3844fc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457590/normal_5fa61d2e89a7b.pdfIn PDF document text
    • https://nosovaranipad.weebly.com/uploads/1/3/4/7/134743093/2136887.pdfIn PDF document text
    • https://dejizova.weebly.com/uploads/1/3/3/9/133986792/bupoferiditanimut.pdfIn PDF document text
    • https://zokilare.weebly.com/uploads/1/3/4/7/134767859/806d65ada694.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392470/normal_5f9913f65ea6d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463551/normal_5fe0abcb3f56f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391037/normal_5fc8fe026f26a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/3b6a464f-b649-4a42-abca-3b17cfc2caa6/66127214900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f4236f5-6730-4edf-a597-f7e5f27f4ba6/the_second_continental_congress_adopt_the_declaration_of_independence.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03b2fffc-9fba-4b19-9ae0-7085b94a7c37/71339497788.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e84d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84D 5420 bytes
SHA-256: 7e5091c0a9153e5e7a4f2acda7bb5950e89b70fdf6d7a0a81420aa0e19be643e
font_01_sfnt_off0000fa9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9E 10408 bytes
SHA-256: 11b12bfece5553683ff0b163bc9ea1597ba0aef3d86ba9709bd95e7fb990d4a6
font_02_sfnt_off00011e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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