Malicious PDF — malware analysis report

Static analysis result for SHA-256 43fd8d60e56476a0…

MALICIOUS

PDF

75.6 KB Created: 2020-11-10 15:19:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a267124b7e5afe6dea351811fadca583 SHA-1: ebdf11efa5ff738e21c5e466255402796541dfdd SHA-256: 43fd8d60e56476a0262dca7a2fa07a50562f6dae6635cc9416582bfd4b5cb023
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI suggest an attempt to exploit user curiosity or trust by presenting a seemingly innocuous search result that leads to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffine.ru/strik?keyword=is+centrioles+only+found+in+animal+cells
    • https://wozuwonasanava.weebly.com/uploads/1/3/1/4/131483955/puxotikijako.pdf
    • https://cdn-cms.f-static.net/uploads/4388038/normal_5fa63563a3559.pdf
    • https://cdn-cms.f-static.net/uploads/4382621/normal_5fa598a4863e7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/12de4bf7-0b06-42ce-8b59-8b2e1a243959/social_security_office_albany_or_hours.pdf
    • https://uploads.strikinglycdn.com/files/f9ec0030-fa5a-482b-ac2e-42d13ab15680/84852554586.pdf
    • https://s3.amazonaws.com/rexogeguxosix/noniteduge.pdf
    • https://s3.amazonaws.com/xanebavifamopez/essentials_of_clinical_infectious_diseases_second_edition.pdf
    • https://s3.amazonaws.com/remeranexe/dragon_age_inquisition_prima_guide.pdf
    • https://uploads.strikinglycdn.com/files/fc0cd590-9d45-4600-a31d-106f53f9fce0/archy_and_mehitabel_poem.pdf
    • https://uploads.strikinglycdn.com/files/52599e09-c87c-4bcd-a548-fd01c645390d/54369715431.pdf
    • https://uploads.strikinglycdn.com/files/cdb2cbd5-1887-4b11-8465-5fc886ab8368/91817662070.pdf
    • https://uploads.strikinglycdn.com/files/8769e465-0088-4641-bd02-6e938c82676a/vesixefatalexukoxobobu.pdf
    • https://uploads.strikinglycdn.com/files/eb1d7375-635d-4c6c-9bb4-a98ba7967822/telesazud.pdf
    • https://s3.amazonaws.com/warapagefasovi/north_ridge_elementary_texas.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c82c.bin
c1e4b845b7155837bd16cbe269d0670aef3592afe74b77c740d54b2f26cc3be4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC82C 5088 bytes
font_01_sfnt_off0000d959.bin
7be7ad8cbfea46198c4b25b449ad74d812cfa9c171b43f09c2776135c4a08b8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD959 10656 bytes
font_02_sfnt_off0000fe03.bin
dea42a645509e47913d94a3c1ff2e7ffecf6ca7e8d06e08a5f86f932263db97d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE03 16060 bytes
font_03_sfnt_off00011296.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11296 4324 bytes

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