Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a261fe138b54eeb…

MALICIOUS

PDF

72.4 KB Created: 2021-02-09 19:44:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 234d05e2e4bc5082f911d888f4599abf SHA-1: 386b9f8fe10b99a0229ce91e95b6ee860c112f61 SHA-256: 0a261fe138b54eeba226543f42fe571bd2093f2dfdc77fbd5a8ef641774d6a9a
164 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, indicative of a link farm designed to manipulate search engine rankings or distribute malicious content. The presence of a "download button" heuristic further supports a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature, likely involving the download of a second-stage payload from one of the numerous embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/aws?utm_term=anjali+anjali+song++pagalworld PDF link annotation
    • https://lujoduxatodovaw.weebly.com/uploads/1/3/2/3/132302833/pesijote.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373788/normal_5fcfb8e50c3fc.pdfIn PDF document text
    • https://pusexijubod.weebly.com/uploads/1/3/5/2/135296384/7b0801f1da5.pdfIn PDF document text
    • https://gekafokolasiga.weebly.com/uploads/1/3/1/3/131384301/7740176.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382952/normal_5fd28863aa867.pdfIn PDF document text
    • https://jadufebifov.weebly.com/uploads/1/3/4/6/134627690/mifovadekolurog-xuwimotosujef-tajetezurotuget-tutekowemina.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376369/normal_5fe46c79270d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413718/normal_5ff290959f3a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489834/normal_5fecbb7746681.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408479/normal_5fef481c28889.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/jebupofedijakuk/atharvana_vedam_in_tamil_free.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_off0000da49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA49 5284 bytes
SHA-256: 98011025848a1301fb49fc29e9950d9bb2dc50ae309f80b3f19fdf1a23d54a1b
font_01_sfnt_off0000ec64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC64 13040 bytes
SHA-256: 818801ebed06bf5fe4f508d9314ee9a8446f9206feac8f51adc9d5b02de9b32c

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