Malicious PDF — malware analysis report

Static analysis result for SHA-256 433f2a2e4ca5b7b2…

MALICIOUS

PDF

67.5 KB Created: 2020-11-13 16:21:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a8a5a9c0709b6d48b4bad1b397b61d2 SHA-1: 06d4974cb9bf209f98623baa6bdf132060573baa SHA-256: 433f2a2e4ca5b7b2d604a83f293065cdc9aeba808690549e06950e78e5a84c37
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, with one identified as a potential SEO link farm. The primary malicious URL, 'https://traffnew.ru/aws?utm_term=bhooter+bhoy+bangla', is likely used to distribute malware or facilitate phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://traffnew.ru/aws?utm_term=bhooter+bhoy+bangla
    • https://wugovokida.weebly.com/uploads/1/3/4/3/134319073/9a7b3e4c2e9f133.pdf
    • https://lovemaxo.weebly.com/uploads/1/3/3/9/133997317/9570648.pdf
    • https://cdn-cms.f-static.net/uploads/4376869/normal_5f95fa7c595ab.pdf
    • https://biwobere.weebly.com/uploads/1/3/4/3/134372714/4352266.pdf
    • https://cdn-cms.f-static.net/uploads/4381090/normal_5f97ecb3c077c.pdf
    • https://cdn-cms.f-static.net/uploads/4381730/normal_5faaa3183977c.pdf
    • https://cdn-cms.f-static.net/uploads/4386848/normal_5f9c2eb419b0c.pdf
    • https://kapekutom.weebly.com/uploads/1/3/4/4/134437999/d29db3d09650b.pdf
    • https://cdn-cms.f-static.net/uploads/4393345/normal_5f99e7dd76d88.pdf
    • https://kepamimap.weebly.com/uploads/1/3/4/6/134609022/7114862.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/684fb801-296a-48bb-ae6d-a4ad58162487/volkswagen_eos_owners_manual.pdf
    • https://uploads.strikinglycdn.com/files/c41fe207-d0ff-4bc9-bff5-f195b4fbc0a4/wimemor.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://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf60.bin
da6dbf0b4b9cd59f350e7da86501d77a8bcc733d892c59798429678005fbd40c
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF60 5060 bytes
font_01_sfnt_off0000d099.bin
067f4ef75ba74e8b3deace7ccc07e66a6867e1b12a036cf8503307644ade51f7
pdf-font-stream PDF embedded font (sfnt) at offset 0xD099 4708 bytes
font_02_sfnt_off0000df99.bin
66463de3f7b2bd48732456e7ad84670caee6b2343110a116b98a8d96487e8dd4
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF99 9668 bytes