Malicious PDF — malware analysis report

Static analysis result for SHA-256 93fda08a64d2e717…

MALICIOUS

PDF

93.5 KB Created: 2021-05-29 05:50:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: c177b9f570d738be9d1a343600de044e SHA-1: 54535cfa74b51fed3b6348ec51b3ac822a596ca5 SHA-256: 93fda08a64d2e717b8b7829d925042952c35b3b6892d8269816468ffb55a0bfd
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. While no scripts were directly extracted, the presence of embedded URLs and the overall structure point towards a phishing or malware delivery mechanism, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://xajibur.ru/strik?utm_term=reflections+across+the+x+and+y+axis+worksheet+pdf PDF link annotation
    • https://nuxutesinof.weebly.com/uploads/1/3/1/4/131437012/xopodesojatarap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402933/normal_60144a19f3e52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482629/normal_600baac88f829.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447097/normal_5fd28a064c2c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490371/normal_6004cb0ace828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468553/normal_5fe716ca186c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368265/normal_5fef3fb28748b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497697/normal_604914c132c47.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455208/normal_5ff3e67997f8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471253/normal_5feb3d56e028b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425916/normal_5fcb2c706fe4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421038/normal_602ff5944c15f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470545/normal_5ffb49be5c46c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485718/normal_5fe00d29d2374.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461748/normal_5fee88ce8147e.pdfIn PDF document text
    • https://lapimirisa.weebly.com/uploads/1/3/4/3/134372347/newos_witutubepijano_pafadej_pumunaki.pdfIn PDF document text
    • https://pugufatafa.weebly.com/uploads/1/3/5/9/135967981/bc318ff6b5c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379034/normal_601b5b6210c71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447877/normal_6019a1a5828dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369146/normal_600cca46ec45d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481275/normal_605c2c3f719dc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10908 5364 bytes
SHA-256: c29c60d1fffc32ecf71d9e8235805489e0ecff27cdc92894546c9e375bd2a7cc
font_01_sfnt_off00011b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B56 11708 bytes
SHA-256: 907b041daffb262621b85e0de9c7cdf46b9a80c40e910093b0051c9276c31c66
font_02_sfnt_off00014315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14315 16148 bytes
SHA-256: d612c605d101522a7b082cd092ef78b209dae850c4a5e940dd0f53fb1bc5669f
font_03_sfnt_off00015825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15825 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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