Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0f07ff007f5137b…

MALICIOUS

PDF

80.6 KB Created: 2021-05-26 18:56:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a24d37e6b6700e3e68d2d0562cf7224e SHA-1: 0e4b82c3e405764317ef253d067550ad29acc526 SHA-256: b0f07ff007f5137b83bb6657c7c764cfe93174be9634153905b6a26ab920d596
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with one prominent URL pointing to a site that appears to be part of this scheme. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution. No scripts were extracted, but the structure suggests an attempt to redirect users to malicious or spam 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
  • 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://jacksth.ru/strik?utm_term=what+personality+type+is+best+suited+for+psychology PDF link annotation
    • https://nusomosuguxapo.weebly.com/uploads/1/3/4/6/134693055/miniwubipozuju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379837/normal_602e70d6a8464.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418370/normal_5fcdbfe6d1d71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386092/normal_5ff36198ee071.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_603d1bb3c609f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466135/normal_600bf0c74b1e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477183/normal_606a5e1ac94a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402507/normal_605fd0df22bcd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503987/normal_5ff1ed17bc7fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472774/normal_5fe8767d7b5fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383687/normal_60493b173807e.pdfIn PDF document text
    • https://zibataluguxomi.weebly.com/uploads/1/3/1/3/131382491/551911.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_604d2073791b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451941/normal_606e2dd1cf10d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416787/normal_6035c0f3e9a4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443804/normal_606a78636403c.pdfIn PDF document text
    • https://xijiweba.weebly.com/uploads/1/3/5/3/135387982/riwin-fuxiso-bekik.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/b91369c9-1d97-4e00-9a70-da3ccaf8e82e/inheritance_cycle_book_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/223028f3-819a-4aeb-9224-c62bbc34558a/diablo_3_barbarian_build_might_of_the_earth.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_off0000fcab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAB 5672 bytes
SHA-256: 35cbcf090049e9d2068c26902c9164d4103307f465c0827c554778ff72d9de76
font_01_sfnt_off00011005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11005 10704 bytes
SHA-256: 75c5e98b12e0142270f8d7bb32083833f489656621405ba063029bc5a4117e31

Open this report in the interactive analyzer, or submit your own file for analysis.