Malicious PDF — malware analysis report

Static analysis result for SHA-256 d98692b3e5ee3d54…

MALICIOUS

PDF

79.9 KB Created: 2021-06-04 12:21:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d519f7f1272eaea3a612d28343e53359 SHA-1: de5ae62b63b4adcad32a97a0f92461928c0e6f91 SHA-256: d98692b3e5ee3d540922283968bfa41f99c0f4d2e50698c19a53184b54292195
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 point to potentially malicious domains, indicating a link farm or phishing attempt. ClamAV and ML classifiers also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it is designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jumiwimov.ru/123?utm_term=assistant+juridique+formation
    • https://mamonesobekemi.weebly.com/uploads/1/3/4/3/134320903/551464.pdf
    • https://gomimujetaveve.weebly.com/uploads/1/3/1/4/131406784/forugu.pdf
    • https://putesoborufo.weebly.com/uploads/1/3/0/8/130814126/tosex.pdf
    • https://static.s123-cdn-static.com/uploads/4428033/normal_5ff2839309122.pdf
    • https://rowopubogapog.weebly.com/uploads/1/3/4/2/134234702/pelemaluwi-sepira-folelobad-toxep.pdf
    • https://cdn-cms.f-static.net/uploads/4477630/normal_605ee6ea9fe97.pdf
    • https://static.s123-cdn-static.com/uploads/4422385/normal_6006bbb8374aa.pdf
    • https://static.s123-cdn-static.com/uploads/4469355/normal_5fee69bd1b990.pdf
    • https://siraxaroxaran.weebly.com/uploads/1/3/1/4/131483069/vuxon.pdf
    • https://sedezexe.weebly.com/uploads/1/3/4/3/134342112/fa6cc6e195f.pdf
    • https://levoveto.weebly.com/uploads/1/3/4/8/134897684/tupataban.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/90729294-b58a-4f3c-88c4-6e926c33e0e0/niletulitevejulafuvivap.pdf
    • https://uploads.strikinglycdn.com/files/fa8116b0-c5a1-4d31-a7d7-21b29294a0a0/caballo_de_troya_2_en.pdf
    • https://uploads.strikinglycdn.com/files/f027fe6a-322a-4923-beaa-a648a6eb27f6/wewavufiwafudekopek.pdf
    • https://uploads.strikinglycdn.com/files/a765ffa7-11c3-450e-9ef1-6a25f6ca155c/what_is_the_hidden_mystery_of_god.pdf
    • https://uploads.strikinglycdn.com/files/76e11a78-ddc7-4817-8c0e-dc3f07063535/symbolism_in_literature_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/06dc92cc-00b7-4b72-b188-9c3e048e9847/camp_chef_pellet_grill_turkey_breast_recipe.pdf
    • https://uploads.strikinglycdn.com/files/5d82598d-24f8-4666-9067-348a14a0040a/metaphysical_anatomy_free.pdf
    • https://uploads.strikinglycdn.com/files/6e1dd623-9f15-491a-8ed4-5c68fdbc2004/wefigutedupesuwaga.pdf
    • https://uploads.strikinglycdn.com/files/d4670cb0-4b5e-41a3-b23c-45e7c407a27d/how_to_cook_chicken_in_a_farberware_pressure_cooker.pdf
    • https://uploads.strikinglycdn.com/files/f3103f16-37cc-4009-96d6-b0a4d6a97fec/how_long_does_it_take_to_write_3_paragraphs.pdf
    • https://uploads.strikinglycdn.com/files/d9615e10-54f5-447b-819c-17f682b5ed90/mimuwop.pdf
    • https://uploads.strikinglycdn.com/files/5ad3e4fe-c34f-4133-a431-3a5043959aa6/zumegupos.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_off0000f63d.bin
5e5c9468384fb273a6e7eb6e6437712b7a379fa9fc4e7961c3965bbdd7f14c1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF63D 5212 bytes
font_01_sfnt_off000107e5.bin
39998087c2d4a52ce0896e36f1adbba67d3e9a4fecda4d6d6309557a764abff7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107E5 12812 bytes

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