Malicious PDF — malware analysis report

Static analysis result for SHA-256 c54960f2256def72…

MALICIOUS

PDF

88.3 KB Created: 2021-05-30 18:55:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e5754499a2c6dff6eae000fde3284c77 SHA-1: b65eb79c7f5d06d4c5b7b8683c5ce9aa3bcb3c8d SHA-256: c54960f2256def720d0ce7736872dd2a80e644eaa84f027a154d52361fad9811
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://soxebez.ru/strik?utm_term=how+to+hack+nitro+type+level+and+money PDF link annotation
    • https://nogapixefakul.weebly.com/uploads/1/3/4/5/134590999/jupakakonek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391317/normal_5ffb32cc54646.pdfIn PDF document text
    • https://tafevivif.weebly.com/uploads/1/3/2/6/132682704/3649302.pdfIn PDF document text
    • https://pafufido.weebly.com/uploads/1/3/1/4/131407890/gabajotukole.pdfIn PDF document text
    • https://xofajusas.weebly.com/uploads/1/3/1/0/131069744/1748882.pdfIn PDF document text
    • https://pakipuxis.weebly.com/uploads/1/3/5/3/135347710/libixor.pdfIn PDF document text
    • https://xibupofuku.weebly.com/uploads/1/3/5/3/135306475/6702462.pdfIn PDF document text
    • https://nujobivodiji.weebly.com/uploads/1/3/4/7/134771327/3901302.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451567/normal_5fdec966dbf9e.pdfIn PDF document text
    • https://suguzavajud.weebly.com/uploads/1/3/4/7/134744383/9795687.pdfIn PDF document text
    • https://zidoboxeped.weebly.com/uploads/1/3/5/3/135324118/f4c10b0539.pdfIn PDF document text
    • https://fajuvupo.weebly.com/uploads/1/3/5/3/135310445/252576.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383471/normal_602d79dcc8dbf.pdfIn PDF document text
    • https://rozomibevepozif.weebly.com/uploads/1/3/0/7/130775668/c0cab392c7cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381287/normal_6025a4a45dc49.pdfIn PDF document text
    • https://lokejefu.weebly.com/uploads/1/3/5/3/135301848/9559327.pdfIn PDF document text
    • https://jamaxukupabidi.weebly.com/uploads/1/3/4/6/134675967/xevebid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402250/normal_5fd27d0a8bbcd.pdfIn PDF document text
    • https://bumudipokipilu.weebly.com/uploads/1/3/4/3/134350227/f9a2ec819aa.pdfIn PDF document text
    • https://bowodazuludov.weebly.com/uploads/1/3/4/7/134700376/1697266.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbc73a23-5169-4d1a-a58a-6b95291f248c/kemper_profiler_stage_vs_head.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8ccc4b1-9628-47a1-926c-3ddcf3435fd7/33831388304.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2f60445-55af-4059-8966-54b52968ddad/perdona_si_te_llamo_amor_pelcula_italiana_completa_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20c0bfd3-ff0b-48ea-91cb-95d52ad44e2d/place_value_activities_1st_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd7e0591-a08a-40e3-86d6-ae25b552ef54/how_much_does_a_criminal_defence_lawyer_make_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8cef690-e577-4af5-868f-faba10738d21/79813674365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1534ca75-712d-43b6-8a50-42a2d4ee2967/64363323152.pdfIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECE 5416 bytes
SHA-256: 2c171e1a4b3c8db7f05f41ada9c67af84c0a511c9ead99a62788935e11feb3e3
font_01_sfnt_off0001112a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1112A 12400 bytes
SHA-256: 303e8f934b286a1520d4e82562d5e103eca5008d2bd80df0977ee75eb1a7aee2
font_02_sfnt_off00013b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B1B 16464 bytes
SHA-256: 7ebd5a94d836bec9b2904dfbb566e9ca051f4109d0e45a2de769e45b3ab80664