Malicious PDF — malware analysis report

Static analysis result for SHA-256 430a9c7ed20b46ce…

MALICIOUS

PDF

82.0 KB Created: 2021-03-22 11:54:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8260b4b9dd976f538f261020fea29645 SHA-1: 7a569dfd9795ebe5c2749021088f1d74724426bd SHA-256: 430a9c7ed20b46ce8dae59a37a7265fa5b21f6a0a28fd9dcb265aefff9917a79
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests it's a link farm designed to host numerous links on disposable domains, likely for phishing or malware distribution. The presence of external URIs and the overall structure point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dugedepap.ru/strik?utm_term=serato+dj+lite+numark+mixtrack+pro+2
    • http://wodebawoxisire.22web.org/45981855513.pdf
    • http://woxagaxizi.22web.org/autoridad_espiritual_watchman_nee_gratis.pdf
    • http://gopidap.scienceontheweb.net/cricket_rules.pdf
    • https://static.s123-cdn-static.com/uploads/4424378/normal_5ff9c8ea8fa6c.pdf
    • http://jubigale.scienceontheweb.net/17189199298.pdf
    • http://sefobadivura.iblogger.org/nesoxumikeviruvet.pdf
    • https://static.s123-cdn-static.com/uploads/4484612/normal_5febdcb8e997a.pdf
    • http://xoroketogejuxe.mywebcommunity.org/xivuvit.pdf
    • https://cdn-cms.f-static.net/uploads/4488141/normal_6011ad566a05d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wotidupodugi.myartsonline.com/south_african_church_history.pdf
    • http://putojoner.rf.gd/7744627274.pdf
    • http://gugamofizuxeg.epizy.com/toyota_motor_credit_corporation_annual_report_2018.pdf
    • https://uploads.strikinglycdn.com/files/0b9d31b9-b367-4ba3-ba3d-214a2768e74d/25465917273.pdf
    • https://uploads.strikinglycdn.com/files/8ddd08a9-4cd0-4a5e-b90e-dc8d5f6abf63/tizusuxewenit.pdf
    • https://uploads.strikinglycdn.com/files/48297116-370a-4f07-bd6d-e05c9475fa54/conversion_6_pulgadas_a_milmetros.pdf
    • http://barukes.epizy.com/63108020885.pdf
    • https://9ffa65b4-b95e-481c-977d-2cf6acaa57d7.filesusr.com/ugd/f68d46_3899c838253e45e2a8a2b72992d6afc2.pdf?index=true
    • https://c3e810f9-371e-40b9-9a0b-4695a496ec77.filesusr.com/ugd/2c7c49_0db144fd43bc4e2ebcd1fea4f555e80c.pdf?index=true
    • http://radisabuvaba.epizy.com/cahier_des_charges_informatique_serveur.pdf
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_e25513b0b0a3464f9b3634f8ebbaf0a7.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e959.bin
7db8ab2d3e4e5fda727f4f4420d8b5e2041c31d048e8a909f9e3c9baafc48410		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE959 5484 bytes
font_01_sfnt_off0000fbf6.bin
28539f0f2f4485e197864d37bd038930433415060f19f2428e54f24eb08334da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF6 11652 bytes
font_02_sfnt_off00012396.bin
503f5200e83b189a546b6c6e1d808633a9135186956fe76ff9bd78de3d91e3c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12396 16060 bytes

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