Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a5a9d73ae840c5b…

MALICIOUS

PDF

77.2 KB Created: 2021-03-18 17:39:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 62888bcdebdd33119059cc39e0034792 SHA-1: 1a67fb7771e62f6ec7e3b6f156c705c038796acf SHA-256: 9a5a9d73ae840c5b1d33e82503a1a871e29fd4225cf7c6a7afc3106b6d1a1c77
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/wix?keyword=online+graphic+organizer+web PDF link annotation
    • http://casserlabs.xyz/17498123745zxqr.pdfIn PDF document text
    • http://bluetea.space/6073027698011z5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446789/normal_5fed15935e0c1.pdfIn PDF document text
    • http://lufatomitonad.22web.org/becker_cpa_study_material_free.pdfIn PDF document text
    • http://xexawapo.iblogger.org/50684691783.pdfIn PDF document text
    • http://gosejoligezo.iblogger.org/garmin_vivofit_jr_bands_star_wars.pdfIn PDF document text
    • http://xemifexebep.iblogger.org/aggression_in_psychology.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368956/normal_604fd24d14f75.pdfIn PDF document text
    • http://drnextact.xyz/66822672218rmzyd.pdfIn PDF document text
    • http://xevimajitufom.iblogger.org/gijuweko.pdfIn PDF document text
    • http://pakijuzovukuw.22web.org/sosimuvidokokibupunigipu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xefejevife/kutudowaxajini.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/plural_nouns_worksheet_grade_4.pdfIn PDF document text
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_f89ede0a14604474a802416378d9d7f3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gumagabu/94232873027.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/jenn_air_cooktop_gas_downdraft_36.pdfIn PDF document text
    • http://vukenorap.epizy.com/jebuvatugefibezofofem.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/carrying_the_banner_piano_sheet_music_free.pdfIn PDF document text
    • https://d046670e-94b8-4ea2-8efc-69fca9b502c9.filesusr.com/ugd/c0b427_6dc6cf24b3d04f0b8f265252ff9f9277.pdf?index=trueIn PDF document text
    • https://74fc1a11-d445-4ffb-bc6b-7a79e5a65a18.filesusr.com/ugd/097bd5_d76b6f73457342cea0316c82771e3120.pdf?index=trueIn PDF document text
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_5a6b78d7dff34326bc467a7cf6e50e38.pdf?index=trueIn PDF document text
    • https://662517ce-f374-4037-aebd-99b1dbe00103.filesusr.com/ugd/0c4177_54a9174e9c9647359ff64201c0156dea.pdf?index=trueIn 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_off0000f091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF091 5328 bytes
SHA-256: 1fcd91d0e51729fc08a7e15681fde62766a61d0db50587670f18a294eed8b35d
font_01_sfnt_off000102c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C2 10816 bytes
SHA-256: a931e765dcd0c0539687fb64a84eb3d4774f354b4e20be92a4c0f4e77d303c5f

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