Malicious PDF — malware analysis report

Static analysis result for SHA-256 d00872dea8b0a530…

MALICIOUS

PDF

73.5 KB Created: 2021-04-29 23:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a1fc7accdba65959ff62b15f745a800 SHA-1: d2f6280c97b37859bcf384dc1906b266a4f7fce4 SHA-256: d00872dea8b0a530e806c5f651cb730aa3b7d296d1d6805746bd95078f94362d
156 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 of which are likely part of a link farm designed to distribute malware or phish users. The document body, though heavily obfuscated, appears to be a lure related to technical search terms, suggesting a phishing or scam attempt. The presence of embedded JavaScript further supports the malicious classification, likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://vilenefex.ru/strik?utm_term=troy+bilt+bronco+42+deck+belt+diagram
    • https://cdn-cms.f-static.net/uploads/4386337/normal_6033990ca5fc7.pdf
    • http://pl50off.info/sexuvowvu1t7.pdf
    • https://cdn-cms.f-static.net/uploads/4483854/normal_60243af0a6870.pdf
    • http://reznitskygallery.com/2004_dodge_ram_1500_quad_cab_weight5cgc3.pdf
    • http://govnososal.xyz/firefox_older_version_for_windows_102sf3h.pdf
    • http://halfraire.xyz/how_to_purge_hydro-gear_transmissioncwfo9.pdf
    • https://cdn-cms.f-static.net/uploads/4402949/normal_5fe7346c435d1.pdf
    • https://cdn-cms.f-static.net/uploads/4487413/normal_604cfc33b527c.pdf
    • http://se-mrush.com/41947951134z7exf.pdf
    • https://static.s123-cdn-static.com/uploads/4415769/normal_5fddb17185a52.pdf
    • http://1xbet-registr.site/best_video_recording_software_androidrrey8.pdf
    • https://static.s123-cdn-static.com/uploads/4465390/normal_5fe49ac0e3b9f.pdf
    • http://brandframeb.com/pifoxinarafutiragiwatephc154.pdf
    • https://cdn-cms.f-static.net/uploads/4387921/normal_60492f9d55df8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://336ddc11-c37d-4cd6-9685-7accad2975f7.filesusr.com/ugd/479fa9_91bf910e091a4e55aa1797aa5747ff11.pdf?index=true
    • https://1350f94c-8d6f-42b4-8351-24983ad6a49a.filesusr.com/ugd/4aae87_c4fadc185984410e93255158182d52d4.pdf?index=true
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_43e9a0994e7a4531bbd7f4306f111c2d.pdf?index=true
    • https://7ef7ebf0-bcb0-4ca2-8538-5a19c3e9f01c.filesusr.com/ugd/aff7ca_de8172ba554f48059428d3ad731f0367.pdf?index=true
    • https://6440a9f6-5e82-4153-977b-4ffe9374ec4a.filesusr.com/ugd/7182f3_75eff339378947d6b3942373ffde7504.pdf?index=true
    • https://645c32c3-7e99-4959-b93b-7980205539d7.filesusr.com/ugd/30a31c_af178a9ffd9345c6b1eb76b7a56033ac.pdf?index=true
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_f9b337271c8b46ad9c2060d6f5fe59b4.pdf?index=true
    • https://1b15a19f-c8c2-4d9d-8c2f-e97aa7ecfe2c.filesusr.com/ugd/eb6c48_e0972a5ef9214dd1becbd91adb7facbd.pdf?index=true
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_e4a8fe32f2d94441ba1cdccbf6264d7b.pdf?index=true
    • https://3d636ecf-b5c4-4691-845c-2d501a7a8090.filesusr.com/ugd/b09df1_10a49cdd868947309470fcc81d7c5909.pdf?index=true
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfd0.bin
4138b857338f6af2d1c9aa001308942eb5e7433c2cef3d82635d62e0380a82bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD0 5556 bytes
font_01_sfnt_off0000f2bf.bin
6522c54d6f45b0218e3b0b7a5bc173bc3b5f2d452c86435295d006406be93479		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BF 10568 bytes

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