Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bb5b68f3fb7e693…

MALICIOUS

PDF

72.3 KB Created: 2021-06-12 05:21:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8aa795bcfb8dac971018a87f1b87b3ef SHA-1: 0a20cd3403824847b79e15906b62309f940a3598 SHA-256: 3bb5b68f3fb7e6932c0f5789eb25e2d5bc37694a56f32332fc9d677cf31d617c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further confirm the malicious nature of the file. The document body, though heavily obfuscated, suggests a lure related to health information, likely to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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://pistant.ru/pbw?utm_term=stretches+for+herniated+disk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4529977/normal_5ff3f151753cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382405/normal_5feb8c75423fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387811/normal_6068304ed8cfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483602/normal_6021250f6fb22.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454184/normal_60070da0bd6eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410191/normal_5fe620cc198b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415770/normal_6021710ef3099.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497359/normal_5ffe511fdc4ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501486/normal_5fe89b7c7f05a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389616/normal_604dcd93dcd3e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421215/normal_5ff68570e7567.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408001/normal_601774525e6e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471960/normal_606577bf83a6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375358/normal_603c30a370375.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387806/normal_604adbd1bbe35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443608/normal_60176bc903b06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380536/normal_604de649b41ee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pusurupufem.pbworks.com/w/file/fetch/144653952/zisikupasawojiwomum.pdfIn PDF document text
    • http://kepojijudiva.pbworks.com/f/how_to_make_pacman_on_scratch_3.0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/360d732b-cf81-476f-862d-2566f3017f18/why_is_the_play_julius_caesar_important.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6ccec43-b3a7-4a73-9b7c-3850fd18bc92/raxonamamogaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2921dc19-5c02-4ac4-800f-2998df910868/30234226210.pdfIn PDF document text
    • http://kuwupib.pbworks.com/w/file/fetch/145138101/old_songs_collection_zip_file_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2f43086-deb6-4caf-9e2b-5488f3ec3e60/how_to_use_igora_expert_mousse.pdfIn PDF document text
    • http://puzavofan.pbworks.com/f/rahu_marathi_kadambari_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/684a4bd7-f51f-441a-b990-eb85cd6a50eb/85198742663.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_off0000dd9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9B 5244 bytes
SHA-256: 80bf4546b901f1445758c20ebbd3f5b2b8a6bd33dc12a93d69967197049abebb
font_01_sfnt_off0000ef6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6C 10968 bytes
SHA-256: aa73292a3da6e81b092d894dad18c3e6bfd90e5738cedcce1da48beb5d89f339

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