Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba9023c77cb31de0…

MALICIOUS

PDF

101.3 KB Created: 2021-03-20 10:02:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 842a58ff20af8cd118df581931a15be1 SHA-1: 4536edaaf26d926a392b5dbe9984f888bc643de2 SHA-256: ba9023c77cb31de09c271a640d8de74241bef086751a48479f46a3e4c4b27830
156 Risk Score

Malware Insights

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

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 0.9997

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 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.
  • 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://leonvi.ru/wix?keyword=chemistry+matter+and+change+chapter+10+solutions+manual PDF link annotation
    • http://gaxazoxisis.22web.org/centimeter_scale.pdfIn PDF document text
    • https://vexibalob.weebly.com/uploads/1/3/4/8/134896466/6720575.pdfIn PDF document text
    • https://mikexilip.weebly.com/uploads/1/3/4/8/134868220/2084dfae.pdfIn PDF document text
    • https://kedumapeba.weebly.com/uploads/1/3/4/5/134593926/mexodemeref.pdfIn PDF document text
    • http://rigojakivuvemi.iblogger.org/ledemum.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/gapuruxumeg/android_weather_app_tutorial_step_by_step.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/22496420721.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/guwanalesuxa.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/61117475591.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/mhf4u_trig_identities_formula_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/13510550132.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/66297197696.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/sadlier_vocabulary_workshop_level_e_unit_5_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/bram_stokers_dracula_full_movie_download_300mb.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/osrs_botting_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/jonetovobusunoka.pdfIn PDF document text
    • http://pudopidurisego.epizy.com/bewasej.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_off00014b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B26 5688 bytes
SHA-256: e651bfe0dc6cd1f6cf4f15eabecad9a6f442a85d7ebf7d286f2882ff370aae87
font_01_sfnt_off00015e58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E58 12244 bytes
SHA-256: 312442693549b8dc98349e5590a467837bf87935c152ada05784d689f840a8f4

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