Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8125822bcb294a6…

MALICIOUS

PDF

80.2 KB Created: 2021-09-19 00:06:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: dc76a48369c74fa73eb06dc1797de88f SHA-1: dd836bbee168b52d8bb2f9618c61c9f4d9aa1f9d SHA-256: a8125822bcb294a6c20b3b83451b54eccbe8976d390eb229808943efa449f128
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the structure and numerous links point towards a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • 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 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://catamma.ru/uplcv?utm_term=among+us+free+play+no+download+unblocked PDF link annotation
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/9424bbd5ebf9a9ff935deed48df7f117/56840829903.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/raxigeporaputun.pdfIn PDF document text
    • https://khogiaydantuonghanquoc.com/images/news/file/gumitivo.pdfIn PDF document text
    • https://dennismaloney.ca/upload/editor/file/60997091147.pdfIn PDF document text
    • http://maekuangudomthara.com/ckfinder/userfiles/files/84449300033.pdfIn PDF document text
    • https://rafaellopezehijo.com/upload/files/wemetakopizol.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/tesolani.pdfIn PDF document text
    • http://the-bom.kr/upfile/files/24058862603.pdfIn PDF document text
    • https://bimetoor.com/basefile/bimetoorir/files/kuxusijanatusul.pdfIn PDF document text
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/nebajogilodapi.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161344090a8633---movoj.pdfIn PDF document text
    • http://megaprestige.ru/uploads/files/32339577398.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/13375806353.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/76521043057.pdfIn PDF document text
    • http://studiotecnicoforace.eu/userfiles/files/zosivumezividakud.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/13050158472.pdfIn PDF document text
    • https://www.gurkhasfinance.com.np/ckfinder/userfiles/files/dimidosesi.pdfIn PDF document text
    • http://nasledie-sluck.by/var/upload/file/64398481228.pdfIn PDF document text
    • https://eklyps.net/images/file/botade.pdfIn PDF document text
    • http://partner-support.net/user_data/userfiles/files/rozetabil.pdfIn PDF document text
    • http://sccsfz.org/upload/2021-09/muvilikadoruv.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/73263402166.pdfIn PDF document text
    • http://egyptlance.com/userfiles/file/domapevuzomosilixa.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://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_off0000d3ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3BA 17376 bytes
SHA-256: a713382902f6ad2c3d038d053686efbd0c84a3f01c8bd4393a5dfb4aea87e8e4
font_01_sfnt_off000100a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A2 11284 bytes
SHA-256: 5e269c62eed143fb750a4e7b2529d0bc731a51d00754256f1b9ff3536c54bc56
font_02_sfnt_off00011ad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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