Malicious PDF — malware analysis report

Static analysis result for SHA-256 b05eb662188491b1…

MALICIOUS

PDF

77.9 KB Created: 2021-04-02 03:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fe034263296e7079c447855dc7e73a77 SHA-1: c7cca682b212ae2c2480e2b5c981b1179f4de9bb SHA-256: b05eb662188491b102b971bf5d31e02f2206a4a6ad3d46ff6f36a3d38bd69a22
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The embedded URLs and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://lozipotod.ru/strik?utm_term=fifty+shades+freed+full+movie+2017+filmyzilla PDF link annotation
    • https://sekitajed.weebly.com/uploads/1/3/1/3/131383533/wuwer.pdfIn PDF document text
    • https://kilifunilazavef.weebly.com/uploads/1/3/4/4/134481566/jiwevas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489734/normal_60663e699d89e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366647/normal_5ffe4f4251d4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374953/normal_60131432a13ae.pdfIn PDF document text
    • https://nunofisodopuw.weebly.com/uploads/1/3/4/2/134234763/kodokibodumatuwubofe.pdfIn PDF document text
    • https://tijirurilulade.weebly.com/uploads/1/3/4/3/134312421/finofanepejan_tifibil_pulom_gapesupeso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409394/normal_5fda95e6119a4.pdfIn PDF document text
    • https://mumetimobenuja.weebly.com/uploads/1/3/2/3/132302956/e621f6.pdfIn PDF document text
    • https://nofokupefuw.weebly.com/uploads/1/3/4/6/134695722/8512389.pdfIn PDF document text
    • https://tapidokebijimub.weebly.com/uploads/1/3/4/5/134577153/desebemalik_fawasaja.pdfIn PDF document text
    • https://kesozawowoguza.weebly.com/uploads/1/3/5/3/135310598/dotakevij.pdfIn PDF document text
    • https://ronurakegilapoz.weebly.com/uploads/1/3/4/8/134852428/e3340d72.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://joluvolob.epizy.com/kowuzapamuvesan.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/nosivanik.pdfIn PDF document text
    • https://4993f9ff-345c-4c03-a8ec-d4f8dac664d6.filesusr.com/ugd/debbe1_422f976273ec49279b2e28a9bb9d69e4.pdf?index=trueIn PDF document text
    • https://c1bbde11-5cda-4f7c-8b74-b2fe90b484f5.filesusr.com/ugd/1c8c6c_5c8d87095ba94db4b8db8c120f3b79fd.pdf?index=trueIn PDF document text
    • https://a97be2a3-bfb5-42de-bba9-b145341b31aa.filesusr.com/ugd/1f2860_97e2a4a0efcd4eafa6d98f2ba87602a3.pdf?index=trueIn PDF document text
    • https://36535336-4f9e-4c0a-b1ad-3385cb5d4299.filesusr.com/ugd/15ebe2_49a0bc655ecb4153a3f29e1497113211.pdf?index=trueIn PDF document text
    • http://finezifor.rf.gd/explain_metabolic_reactions_and_energy_transformation.pdfIn PDF document text
    • https://9526c93a-d340-4dca-b5fd-2864ff0888c4.filesusr.com/ugd/4c3d6a_cba1d9464fa54bf0acffe8d86b2b17dd.pdf?index=trueIn PDF document text
    • http://sotexazonilot.rf.gd/nizeviguwubedisegowopupu.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/sheetrock_over_old_plaster.pdfIn PDF document text
    • http://palalujopaxuv.epizy.com/nordictrack_gx_4.7_exercise_bike_price.pdfIn PDF document text
    • http://bitemidimalu.epizy.com/zoxakuxetukuwodirowutota.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF70 5720 bytes
SHA-256: 24d3965f66e24679230f360ec87e47956f7ef2abd39dbe561beea913168b2261
font_01_sfnt_off000102e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E0 11412 bytes
SHA-256: 2198d1c7aa416c46b821cabd139bd06ec346a221af6c4682fa4fada826fc9a3c