Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cda640e2952e430…

MALICIOUS

PDF

67.9 KB Created: 2020-11-25 21:43:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 43748edd342d181a62ad8199bbf6bf9a SHA-1: 569cf3f3de4f532963b33e9facbc8f06721fd60e SHA-256: 8cda640e2952e430330a3fb7d3fd060c69746e7d90e7a3c17cbb38bd34a4ed78
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to a 'Red dead online money glitch', suggesting a lure to attract victims. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://traffmen.ru/123?utm_term=red+dead+online+money+glitch+xbox+one In PDF document text
    • https://cdn-cms.f-static.net/uploads/4460446/normal_5fb81d5b8d188.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/97e5590a-8784-411e-bc60-c1ecd0c039cc/3470978567.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66e3f3aa-a4bd-4fc0-b5d9-952a69708208/megerukawutumod.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/23430846028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/580c5fa2-48a0-4ab5-88bc-a86ebfd463db/macroeconomics_answers_questions_such_as_what.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e6648b4-bf53-4315-9f17-dca0c4c5512f/honeywell_vista_10se_programming_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b65a1b7-ad0d-4c4a-b857-587cd6b0d06c/55050291938.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/cec_conference_2020_lafayette.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f7ec89e-d6bc-43e5-a071-482b4fe0eb81/my_pltw_activity_2.1.4_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1b664c9-cc66-4331-abe9-20415e31f2e1/40846644297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/568ed39c-56f7-4f02-a99b-d66d1e9ad5c9/52365733798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34781fa4-5081-4abc-b8f8-3c87b15e58b9/vofujete.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_off0000cb37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB37 5396 bytes
SHA-256: 11d0f242a2530f9a18f139327f900e77470d5fb30fca6387aa2b99e06b35abcb
font_01_sfnt_off0000dd81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD81 11208 bytes
SHA-256: b9eba751d260f89c0652721df5a905ee69baea84518e4f31a349e54edb81660b

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