Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc854d957931b818…

MALICIOUS

PDF

68.7 KB Created: 2021-04-04 16:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 865a45a67b771b6536e979ed078237ec SHA-1: 7fa7c0e871b23be4476b56eeb93320ca2867758a SHA-256: dc854d957931b8186cda356ef09ba32c32f82db77eb5ed1b585a79498b02f5ac
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URL that points to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body and metadata also contain references to this URL, reinforcing the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://botokaw.ru/strik?utm_term=ryze+scorch+vs+gathering+storm
    • https://cdn-cms.f-static.net/uploads/4487665/normal_6066905b0ebab.pdf
    • http://rudovatimokasum.medianewsonline.com/21109108266.pdf
    • http://wupemokabate.scienceontheweb.net/99737504535.pdf
    • https://static.s123-cdn-static.com/uploads/4384644/normal_5ffa6ba7a17f2.pdf
    • https://cdn-cms.f-static.net/uploads/4474192/normal_604d7167dccc5.pdf
    • https://static.s123-cdn-static.com/uploads/4450513/normal_5fc8a92add03d.pdf
    • https://static.s123-cdn-static.com/uploads/4458132/normal_5fe3bd93683ac.pdf
    • https://cdn-cms.f-static.net/uploads/4500883/normal_6042d659dd9bd.pdf
    • https://cdn-cms.f-static.net/uploads/4455399/normal_600c462d97836.pdf
    • http://navevukosuso.mypressonline.com/74243261649.pdf
    • http://fegokodelaxen.scienceontheweb.net/44872118348.pdf
    • https://static.s123-cdn-static.com/uploads/4490369/normal_5ff892b08caee.pdf
    • https://cdn-cms.f-static.net/uploads/4365591/normal_603b0625d4394.pdf
    • https://cdn-cms.f-static.net/uploads/4488809/normal_606788e790cb1.pdf
    • https://fogurasetaj.weebly.com/uploads/1/3/5/9/135961985/87a415dcf39ae.pdf
    • https://fexaxotira.weebly.com/uploads/1/3/5/4/135401388/xesavip_newopawiko_xavaliwipag_funumanesaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/41649802-5f0f-4e27-9888-9ef0bf91dc02/yamaha_motif_xf6_price.pdf
    • https://uploads.strikinglycdn.com/files/e035a998-3865-4a9a-860f-bc639d78d24e/sekelavo.pdf
    • http://rabelame.atwebpages.com/hindu_astrology_books.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_off0000cfa0.bin
aa6452bb0c943b464427abf6bf2151cb55328a7f0126dfda5d43822a8a54be55
pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA0 5400 bytes
font_01_sfnt_off0000e1f8.bin
f534cf4d39925e17f7433a5af2618e0ca07220906cd6001e0237b716a2da6470
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F8 10456 bytes