Malicious PDF — malware analysis report

Static analysis result for SHA-256 47a0edd6ec6013d3…

MALICIOUS

PDF

78.5 KB Created: 2021-04-19 21:20:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 956bac300380d587464b4e96c62864ae SHA-1: 24df14bce77950b65ead97e30cb66246b31ce80c SHA-256: 47a0edd6ec6013d313a9643013094543359234f90794dbc3db5e5fce518fd398
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains and employing SEO-like tactics, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and external links are indicative of a phishing lure, potentially leading to further malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://jacksth.ru/strik?utm_term=ender%2527s+game+movie+download+in+tamil+dubbed PDF link annotation
    • http://pumujavebedopa.iblogger.org/ganulixupomi.pdfIn PDF document text
    • http://loxalidigitoja.iblogger.org/which_studio_turned_down_star_wars.pdfIn PDF document text
    • https://gomimujexewawid.weebly.com/uploads/1/3/1/0/131070583/54d7442a7728.pdfIn PDF document text
    • https://lerinaxupol.weebly.com/uploads/1/3/4/6/134662503/zesini_gekitox_pofix_fovoni.pdfIn PDF document text
    • https://taxepenobeg.weebly.com/uploads/1/3/4/3/134355702/fopan_widetavaseb_rurif_titumoleva.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409122/normal_5fee0ccf3b10e.pdfIn PDF document text
    • https://manedubel.weebly.com/uploads/1/3/4/5/134587872/8956914.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455658/normal_5fe711e73bfa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416318/normal_6016118429a95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496577/normal_5fed105853d81.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d45380bd-a93d-4ef2-b2bd-4c7806d1f6db.filesusr.com/ugd/5d2cf3_e769dc83529f4a65bd6bb4f216eb9321.pdf?index=trueIn PDF document text
    • http://vujoponax.epizy.com/tipumifigerowalosu.pdfIn PDF document text
    • https://63b1f34b-4847-450f-8d9a-4788d10e1cf5.filesusr.com/ugd/451a43_b980972728b449d9b09295b0d5d1d97e.pdf?index=trueIn PDF document text
    • http://mafojupovovod.rf.gd/chrome_browser_pc_32_bit.pdfIn PDF document text
    • https://c18d7360-3707-4bf1-9d6f-52ba7510fa17.filesusr.com/ugd/76cb06_dfa99f1ace7c421fa8d3e6479e323883.pdf?index=trueIn PDF document text
    • http://rogofijanititad.epizy.com/autismo_definicion.pdfIn PDF document text
    • https://df9240ce-57b4-430e-a582-521170ca5232.filesusr.com/ugd/10b03a_745564cb225f42a687d85567330f97ca.pdf?index=trueIn PDF document text
    • https://1afae0f6-9e35-4dc9-9db7-5dbf78511926.filesusr.com/ugd/afe78f_cc38cdd5e2da43089c362a3737bd9f1e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/86f15ebe-8bc6-4d3a-bcb2-4e9edffeeec3/jepozeziriwe.pdfIn PDF document text
    • https://ec8c99fd-5413-4e38-b6a0-2ccbba71fc6f.filesusr.com/ugd/de02f3_f6d873542aa44361915f5a972a7aee8c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ee6a8d8-af6b-472e-bf90-07ef31874ed2/binevarenetizusubowe.pdfIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_dea91182fb634735b77b45bdea26b3f6.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C9 5428 bytes
SHA-256: da39db2bd11ef92675aca85d5e8979d2f303c78dbcbd75678395dd42317c6c10
font_01_sfnt_off00010647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10647 11204 bytes
SHA-256: f41073c8fcdc5461bf57368e4521649caca1c7b82fe299cf53b1f5175e2033c7