Malicious PDF — malware analysis report

Static analysis result for SHA-256 58200d5c99d47b35…

MALICIOUS

PDF

61.9 KB Created: 2021-01-01 20:39:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a70be6b12173b2a56b20405d14d471e6 SHA-1: b5a48e141a85067bf9f87933d69452c573482021 SHA-256: 58200d5c99d47b35b5816ddbd34d8d033a872430ec0f08a7d8ca68f549c0f35b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for phishing or distributing further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a malicious intent to redirect users. The ML classifier and ClamAV detection strongly indicate maliciousness. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://traffset.ru/123?utm_term=adventures+in+diving+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/lepemafe/ixiagcD/stickman_downhill_motocross_mod_apk_android_1.pdfIn PDF document text
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/c62ab695cfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5fb889e638733.pdfIn PDF document text
    • https://punotajevi.weebly.com/uploads/1/3/4/2/134266109/kewikox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416143/normal_5fe786b75ffa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402261/normal_5fd345686e4ac.pdfIn PDF document text
    • https://cdn.sqhk.co/fisejadiruw/sDjdff4/chronicles_of_crime_scenario_3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5fb5755e401ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485579/normal_5fb2c3666e0ba.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/25a55d23-b11a-48d2-ad46-b05c12c90e52/graphpad_prism_5.00_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/990f1246-43c5-401d-88b1-9975b9414d2b/battery_plugged_in_not_charging_hp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bd4634f-8a59-4834-9240-8e1c0589fc2d/harry_potter_lanetli_ocuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b72f83f4-1111-4757-b282-b593ea2242a8/desarrollo_de_sistemas_de_la_informaci_c3_b3ne.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3bc13ee-0e24-4f1b-8f54-77f51350a033/kunidurake.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_off0000b66a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB66A 5412 bytes
SHA-256: 4b1f3a9bc6f6942f6f2f176784eef264c6ced1d813bacc78876ee5ac4fab9e75
font_01_sfnt_off0000c8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C1 9964 bytes
SHA-256: 1d893c6fd213aab41dae718fcd974885df57d5486ea43e49725c2b9f69630d96

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