Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5237374108e933b…

MALICIOUS

PDF

119.1 KB Created: 2021-04-28 19:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40d7652c4d4817d9342522b4041d0e69 SHA-1: 5b25b0a4250c2bbdfda3ff35435adfa9afe5a8cf SHA-256: a5237374108e933b5e22e105c9444d0a1443cdf6e4afdefd499931986ea8af16
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 SEO poisoning and phishing. One prominent URL, 'https://seumenha.ru/strik?utm_term=how+to+insert+currency+exchange+rate+in+excel', suggests a lure related to Excel currency rates. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://seumenha.ru/strik?utm_term=how+to+insert+currency+exchange+rate+in+excel
    • https://static.s123-cdn-static.com/uploads/4413982/normal_5fcf52e7cb14c.pdf
    • https://cdn.sqhk.co/riragimi/da64goN/todo_list_react_hooks_codepen.pdf
    • https://wisadokuresagor.weebly.com/uploads/1/3/1/4/131436967/rafifo-wagogoxejesugog.pdf
    • https://rupebadik.weebly.com/uploads/1/3/4/4/134465272/waxifatenirik.pdf
    • https://galixasuja.weebly.com/uploads/1/3/4/5/134518214/fujaganeva_filixurod_fupirebibaxu_zifutosilime.pdf
    • https://static.s123-cdn-static.com/uploads/4420617/normal_5fdd8fdd3e050.pdf
    • https://gemiletux.weebly.com/uploads/1/3/2/6/132681217/xekazawipudet-segepedotuja.pdf
    • https://static.s123-cdn-static.com/uploads/4459029/normal_5fee413ade705.pdf
    • https://cdn.sqhk.co/vedoreket/thahew4/80656097218.pdf
    • http://bimovixexena.scienceontheweb.net/nafenelefef.pdf
    • https://cdn-cms.f-static.net/uploads/4448339/normal_60669422a3ab4.pdf
    • http://dexaputanit.mygamesonline.org/character_description_vocabulary.pdf
    • http://lojapidabud.mypressonline.com/famobobilazevaxuta.pdf
    • https://cdn.sqhk.co/sipebesoxu/gjpcJjg/tozogivubimafoduvoge.pdf
    • http://kovamuwaropepu.getenjoyment.net/fejuzeluwoso.pdf
    • https://cdn-cms.f-static.net/uploads/4409425/normal_602c8104f265e.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://3857ddc0-2b33-46ba-b4a8-ebef9b167687.filesusr.com/ugd/5cc0d5_edc7b811a0fc4383a01b06fb97536619.pdf?index=true
    • http://zaduzos.myartsonline.com/definition_of_business_research.pdf
    • https://eda93683-a6ca-45e9-8056-ca7adea7f1dc.filesusr.com/ugd/d655db_2c9389c217f64be1a86453aa19bb5a74.pdf?index=true
    • https://e668d0bc-6b9c-4787-ac64-5363b724ef62.filesusr.com/ugd/6ec699_b523aa0a68d646ceac0c59af63a75f84.pdf?index=true
    • http://jofikuv.atwebpages.com/20770876060.pdf
    • https://a29d81ee-e589-4368-99bd-4e0be04eb4c0.filesusr.com/ugd/a89e6e_657a6b8bc9534c1aa28a884a27f3f50d.pdf?index=true
    • http://wififeju.atwebpages.com/60481467693.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017079.bin
c90e0e4a79ceffe808cf46746c0998807964ce8b8740714596128e6a9b291969		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17079 1876 bytes
font_01_sfnt_off0001796a.bin
0edee3e8db73b7e9637cd6908077b411ce0e497447c23bb40837d8e57abcd802		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1796A 5284 bytes
font_02_sfnt_off00018b79.bin
c8ff1418c5d63d4b2ac5ea6e7dbb2e47e13f0a66d3927849d5d684dd52903d8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18B79 13248 bytes
font_03_sfnt_off0001b7cf.bin
a13d396509857bb5ec71b5fb128ea7e9cc24dd7232d6f0fbbf7a572d834ee6fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B7CF 16208 bytes

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