Malicious PDF — malware analysis report

Static analysis result for SHA-256 324b3b9c80b1da63…

MALICIOUS

PDF

80.2 KB Created: 2020-11-19 00:56:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1f2d08f1c524a920d8b1c5c54f2213c4 SHA-1: 04dacf97ee6855aa7bdb03ca1e276cc242ee5b98 SHA-256: 324b3b9c80b1da630259b7c1fbb6b26b5dc1cf742368202cf3e68745c827601a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with the primary heuristic identifying it as a link farm designed for SEO manipulation. One of the embedded URLs, https://traffnew.ru/123?utm_term=econ+job+rumors+marketing+2020, is flagged as suspicious and likely leads to a malicious site. The ClamAV detection and ML classifier further support its malicious nature, indicating it's a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/123?utm_term=econ+job+rumors+marketing+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402712/normal_5f9ca281574ab.pdfIn PDF document text
    • https://rikurifijuse.weebly.com/uploads/1/3/4/6/134681474/kakegibefokow.pdfIn PDF document text
    • https://kilejotiwig.weebly.com/uploads/1/3/1/4/131406519/doxixenisidinadon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372982/normal_5f9d3bc612c55.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/all_animals_names_in_english_to_telugu_with_pictures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5098ec01-7e99-4eb8-b8d9-91d73ade84b9/zevokularewerisid.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/victoria_2_hfm_admit_hegemony.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd95b974-3ed3-41ec-92fa-174022053d71/28912913908.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/mrp_1x_v3_upper_chain_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/motubefinajarazo.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/silapa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f10a44b1-575d-4be4-995d-0f69b05d7947/dark_souls_3_knight_leveling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/valasev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87ac3c7c-580c-4f8d-88d3-b02596d88b5f/17207948755.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/top_software_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33588e58-f715-4df2-982e-5ab39b039ab8/43267301717.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/2829321469.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/advanced_battery_materials.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d28a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD28A 11176 bytes
SHA-256: 81eccdf3c148974d812741861560496cc521529384bcbfe14cb0bf10ad239ac7
font_01_sfnt_off0000f703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF703 5596 bytes
SHA-256: ff0ff5ce23a9db5f9c1c61f92940376ca86a0807cb339c100d21db31278be472
font_02_sfnt_off00010a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A05 13372 bytes
SHA-256: 59a24f30835c421408fc0dcfc1de5bb67d56193b0801388a96c314d4328189c8

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