Malicious PDF — malware analysis report

Static analysis result for SHA-256 c65635a4a8a3364a…

MALICIOUS

PDF

80.0 KB Created: 2020-11-19 05:39:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba20f291281785b5e2b3831d45e8f3f5 SHA-1: 5e255a9c7b24aa9132affab19d06dfb7a4c7ef40 SHA-256: c65635a4a8a3364a934f26856ddbfbd8134fdd83422cbb265131e4e911503268
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to PDF files hosted on Weebly subdomains, suggesting a link farm designed to distribute malicious content or engage in phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of malicious activity.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/strik?utm_term=garmin+glo+2+manual
    • https://dubuzosokiboxof.weebly.com/uploads/1/3/1/1/131163723/libigopuvafa.pdf
    • https://magojumenuta.weebly.com/uploads/1/3/4/3/134361537/fumuladet_visafudinijiw_temedidexusidom.pdf
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/kugopakow_pikisonexax_pubixubu_kojitalesadipuf.pdf
    • https://cdn-cms.f-static.net/uploads/4500667/normal_5fb57afaf02aa.pdf
    • https://cdn-cms.f-static.net/uploads/4410006/normal_5f9b9bf97949e.pdf
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/58e92cf.pdf
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/dubawewu-ruvexumobeze-juguzedoto.pdf
    • https://cdn-cms.f-static.net/uploads/4385648/normal_5faefd663791a.pdf
    • https://fiwuvoreguno.weebly.com/uploads/1/3/4/0/134000104/nenasipetu-rusamone.pdf
    • https://cdn-cms.f-static.net/uploads/4369793/normal_5fad9d9222828.pdf
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/9620789.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d778ba09-efde-4479-8ae1-60b09c6ebe8f/nifesafuru.pdf
    • https://s3.amazonaws.com/leguvefu/beginner_s_guide_to_digital_painting_in_photoshop_characters_download.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd3b.bin
16e1a09373a4b29170903d1e0f81a3091fcb63ff7bce3a845752d53f99852a8b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3B 4992 bytes
font_01_sfnt_off00010e1f.bin
641d5b17172325dba23af9124bb5b2c9ba833c1325d645371ebc798b14c0dce4
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1F 10928 bytes