Malicious PDF — malware analysis report

Static analysis result for SHA-256 937407aaf2242666…

MALICIOUS

PDF

70.9 KB Created: 2021-04-05 09:37:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 06042af0e032a694b360863d72016fa2 SHA-1: 55d5e817f571132c73339c271d8cf4d0e2a6e622 SHA-256: 937407aaf224266639057a6b2aa91374b62f3408b0455e4d99c2e8188b2d457c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that masquerades as a search result, aiming to trick the user into visiting a malicious website. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URI is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://zajinet.ru/strik?utm_term=who+really+invented+electricity PDF link annotation
    • https://cdn.sqhk.co/xugumewaz/v9gigdq/rowawamepawoj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376127/normal_5fc6c93c418b4.pdfIn PDF document text
    • https://cdn.sqhk.co/wexazaruko/dhfifge/mater.pdfIn PDF document text
    • http://supportcopyright.net/44600033428dgezz.pdfIn PDF document text
    • https://cdn.sqhk.co/telivagawu/fghifjj/44385090134.pdfIn PDF document text
    • https://cdn.sqhk.co/rejibebadit/fichehb/67077332214.pdfIn PDF document text
    • http://uscarins.info/kilagasaqafx0.pdfIn PDF document text
    • https://cdn.sqhk.co/foxidagon/jdNjjje/93008242800.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484815/normal_5ff66bf09d760.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/097a72d7-1238-4703-bee0-b20fcbd043c2/42368512296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e6cb20a-4197-45c2-aee2-c6ae22ee5b48/60145365799.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aeb632e-4d30-48b6-a73b-d53d33a56176/hp_officejet_pro_8610_setup_cartridges.pdfIn PDF document text
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_d2f1af3701914d6ab9d7b199595320fb.pdf?index=trueIn PDF document text
    • https://39ad70c8-6a03-4de2-a89b-b0209cba5754.filesusr.com/ugd/d2759c_cabcfa6ddf9d41aea6a1ab5055a5e37a.pdf?index=trueIn 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_off0000d7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F5 5024 bytes
SHA-256: f8c21a7a0a2b760a3466155ea02be196e80bdc9ea7f915b5d380a5e9a30a882e
font_01_sfnt_off0000e91c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91C 10568 bytes
SHA-256: 59ee86628c5c0dab234c4a35f41b45f59babb9f2855d78cd4a920a5658185a00