Malicious PDF — malware analysis report

Static analysis result for SHA-256 16435db2df2b76f0…

MALICIOUS

PDF

78.0 KB Created: 2021-02-20 09:31:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7e34d29cb73be6e0331b44d66d3b26c5 SHA-1: 2054f078b579664c3b009c798d7702e319798a95 SHA-256: 16435db2df2b76f046a62fb75d4252d13c3c4730d30e910889accaea9dfafed6
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution campaign. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM further supports this by identifying the PDF as a link farm on disposable hosting.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wix?keyword=website+destroyer+download PDF link annotation
    • http://artrosil.xyz/ajanta_paintings_information8w2ut.pdfIn PDF document text
    • http://barberking.best/pumuxapasoyi442.pdfIn PDF document text
    • https://dutebosolet.weebly.com/uploads/1/3/0/9/130969562/tazifalogemut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444657/normal_5fd34817ab726.pdfIn PDF document text
    • http://lnstagram-blue-ticks.com/dozizijovapemowedijay0hc3.pdfIn PDF document text
    • https://funofumid.weebly.com/uploads/1/3/4/8/134886651/ef078fb9b54379.pdfIn PDF document text
    • http://icily.xyz/chemistry_of_carotenoidslq7jw.pdfIn PDF document text
    • http://domensita.fun/vugune6ov34.pdfIn PDF document text
    • https://mewurotimopu.weebly.com/uploads/1/3/1/3/131381658/16e080be.pdfIn PDF document text
    • http://ehaberdevlet.com/203985355578oaer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405660/normal_601a4bae45fa4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451945/normal_5fd649e2c58db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374009/normal_60090c72af735.pdfIn PDF document text
    • http://vinograd.io/what_are_the_4_special_duties_of_the_president6g2sw.pdfIn PDF document text
    • https://xexonukomamub.weebly.com/uploads/1/3/4/3/134353621/6882275.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370996/normal_600c8c5d99a55.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/96462139845.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_off0000f458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF458 5168 bytes
SHA-256: d6e73b7b7a758a427f809a334da60d046ad9046e825d2813eee005b460bcb5d0
font_01_sfnt_off0001060d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060D 10856 bytes
SHA-256: efe78a3331ef8489e71320ea67cc3b809eeeffee86e66f9f60d7fce9a33c9deb

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