Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f6e6897027e9d09…

MALICIOUS

PDF

73.5 KB Created: 2021-04-06 16:53:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 268b8bc03e421760e3f41eeda93d3628 SHA-1: b1119af22f8be77999ee42a38e9ea76afbbe6a28 SHA-256: 7f6e6897027e9d091c0726d0ec1712773842d4e981d0632e38171cae4cff1a1a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a security-bypass lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://kuzutuzo.ru/123?utm_term=chrome++certificate+error PDF link annotation
    • https://cdn.sqhk.co/fakozunada/djHkjbu/jellyfish_jam_piano_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/AghVfhg/jowawudi.pdfIn PDF document text
    • https://cdn.sqhk.co/gowamojon/Zgcjgqr/apasl_guidelines_hepatitis_b.pdfIn PDF document text
    • https://cdn.sqhk.co/duditizonut/jgwUQyx/81973647647.pdfIn PDF document text
    • http://segwaywheelchair.ru/difference_between_global_developmental_delay_and_learning_disabilitya3fd7.pdfIn PDF document text
    • https://cdn.sqhk.co/girolivudafo/dhgrloD/scruffy_looking_nerf_herder_meaning.pdfIn PDF document text
    • http://meetchambre.xyz/will_diet_green_tea_help_you_lose_weightdgjte.pdfIn PDF document text
    • http://lami-lashes.site/zenidepanapitiwimemabisidagpen.pdfIn PDF document text
    • http://doorstepcomputers.com/ninja_knife_holderwhtem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3c3b6f52-20a2-448a-be11-eec5930c502f.filesusr.com/ugd/0ca786_6f8f8e44709c4340afb2353f040505c4.pdf?index=trueIn PDF document text
    • https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_523aa39868ad401a8eb44e5c37b141a4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/idl_reporteros_direccion.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/39723409841.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/xuwejasalisivul.pdfIn PDF document text
    • https://89f68ddc-9f98-4e60-8afa-3e0ca6603e9e.filesusr.com/ugd/4725f1_91ea872c703f447f8027fda154440c8e.pdf?index=trueIn PDF document text
    • https://4454cc88-256b-48ad-9013-c0414c72072d.filesusr.com/ugd/67e251_e38869ad7fdd44bc953f24dd9e7ea504.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/leave_of_absence_request_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/google_analytics_android_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/jazzy_select_battery_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/pulafutoxux.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE390 4816 bytes
SHA-256: a69e39ed974f86a77dad06de6a9debed4a92047a4207e126cf4222be28574d00
font_01_sfnt_off0000f3c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C1 10864 bytes
SHA-256: 7e7fbb1bf78c29c6deeabb77d9684df60754330ebccac6244d4e36071d7c9f40

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