Malicious PDF — malware analysis report

Static analysis result for SHA-256 09bfdd96ab66da1c…

MALICIOUS

PDF

78.2 KB Created: 2021-01-01 07:15:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3f97f8c9f0b640f2185bcc18e3be97fd SHA-1: b7ca683232d2844021f43fc335780efdde6864ee SHA-256: 09bfdd96ab66da1c47af085698228116b7c32b7c9d3b093214eb090ec3a3f586
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are obfuscated or lead to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier and ClamAV also flagged this PDF as malicious, specifically as a phishing or trojan variant. The embedded URLs suggest an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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/square?utm_term=acca+bpp+f9+study+text+free PDF link annotation
    • https://fikupekuxugo.weebly.com/uploads/1/3/4/6/134612485/mupupinejuvusojepige.pdfIn PDF document text
    • https://cdn.sqhk.co/rularijulen/zhejdji/rabosuk.pdfIn PDF document text
    • https://cdn.sqhk.co/pozuwifofub/jjAiiFP/catfish_fish_tank_mates.pdfIn PDF document text
    • https://cdn.sqhk.co/zebusukef/R4cy8eB/dad_you_nailed_it_hammer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503033/normal_5fe275955974d.pdfIn PDF document text
    • https://cdn.sqhk.co/wotutovebo/idljj0S/globe_at_home_default_password_dn8245w.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/faad94d9-a94c-405f-9482-d96d6c3a3ef0/noruva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea24a057-aae5-4c04-9f3d-d5c274245423/spirit_airlines_voucher_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9447bd90-4177-4886-91d3-3843edb8dcf3/vector_game_download_free_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa32ff44-5ad0-4cff-9e81-740292d89841/46304609220.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/998b55cf-520b-4a41-9b87-3b10946bc045/90342540677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/320fc574-9aa0-4782-b60c-1d6f957bc7ad/volcanoes__plate_tectonics_worksheet.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C6 5572 bytes
SHA-256: 7d989ccf708ecf697cfbae0587d91bf7a7da77b8c1a06a8e38371d121e6506fb
font_01_sfnt_off0000e7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CC 2472 bytes
SHA-256: 203059f004631094afc1c26962954d4d624067d4ba7600eaa91204f6a88510eb
font_02_sfnt_off0000f2ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AD 10164 bytes
SHA-256: 44fc4aeb63a7848c4a0f7b94da10c7a5c00476c1d58bda790c365e5ad5b0703d
font_03_sfnt_off0001159a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159A 16344 bytes
SHA-256: ed45a24507f18daeaf6b6e9cac20235e9e43bed88bc2d44b7621eff085e31190

Open this report in the interactive analyzer, or submit your own file for analysis.