Malicious PDF — malware analysis report

Static analysis result for SHA-256 35e135cc03814d0c…

MALICIOUS

PDF

80.6 KB Created: 2021-03-24 05:06:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d09a893a33d0bef28b2516dcb858c90 SHA-1: 65710f30406d4803e1d90d555b4d415da08ef63e SHA-256: 35e135cc03814d0c474ffdba4930c417758f57a4179e189b709cfe06ae03c59f
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, suggesting a link farm designed to drive traffic to potentially malicious sites. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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-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://resalured.ru/strik?utm_term=replacement+stylus+for+technics+sl-d202
    • http://lobulezinovux.medianewsonline.com/wearever_pressure_cooker_seal.pdf
    • https://vipekisurular.weebly.com/uploads/1/3/1/4/131453387/2850010.pdf
    • https://cdn-cms.f-static.net/uploads/4373004/normal_6041f0ae66fa1.pdf
    • http://ruvujagefeko.mygamesonline.org/how_many_miracles_in_the_new_testament.pdf
    • https://nabokopawupanav.weebly.com/uploads/1/3/0/7/130739772/13a12a2db28f2c4.pdf
    • https://static.s123-cdn-static.com/uploads/4415935/normal_5fdfc7f976012.pdf
    • https://cdn.sqhk.co/wukufazujuv/ejdBmie/nuvagodifetofukukoru.pdf
    • https://cdn.sqhk.co/siboxowimu/eIFyry2/wifukavupu.pdf
    • https://rasisepuwefu.weebly.com/uploads/1/3/4/6/134678142/bawutujak_vesapuripiv_dofamimane_mutibuviriw.pdf
    • https://muwemobivom.weebly.com/uploads/1/3/0/7/130776082/2969833.pdf
    • https://dolojimopa.weebly.com/uploads/1/3/4/8/134887070/b7f9a29400f4d.pdf
    • https://cdn.sqhk.co/dodufiruw/iegjBHu/craftex_drum_sander_for_sale.pdf
    • http://fawaxifiwuzodil.scienceontheweb.net/certificado_de_origen_mexico_costa_rica.pdf
    • https://cdn.sqhk.co/safubuguva/0phhqgc/58238727458.pdf
    • https://cdn-cms.f-static.net/uploads/4381788/normal_60499151a66e4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d6a293f2-6876-493d-91b7-c13182b05023.filesusr.com/ugd/bcaa7e_d329bd1212f1438aac79f9fa7292e853.pdf?index=true
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_816657ab77484ab3aaf3f3026ade55f2.pdf?index=true
    • http://xovefopu.myartsonline.com/banking_management_system_project_report.pdf
    • https://aed0ee3a-d217-4696-a563-de9ff15d6c37.filesusr.com/ugd/f80e3f_e5a5f05262c84971966f1733c297b4dd.pdf?index=true
    • http://keregimuw.onlinewebshop.net/58934149990.pdf
    • https://19aaccd0-9772-41b6-85c4-be118606641a.filesusr.com/ugd/a12125_3af14209fbb14673af16805c3cb7684a.pdf?index=true
    • http://fabevax.myartsonline.com/xamero.pdf
    • http://bibezakomi.myartsonline.com/94030028097.pdf
    • https://dab7fb03-f2af-4a8e-9cb9-31de623bedb3.filesusr.com/ugd/58b596_062ce6e136ea438796c8b02a4b256dfe.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_off0000e3df.bin
9175fa3a1638b4327cd84c012dc4dc46d61215b50be49323454283532e39c8d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DF 5812 bytes
font_01_sfnt_off0000f791.bin
de6c615ec06eb49250ea3714210fd7400643f314fbd076e7b58ba1cd916b5856		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF791 11344 bytes
font_02_sfnt_off00011e97.bin
31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E97 16204 bytes

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