Malicious PDF — malware analysis report

Static analysis result for SHA-256 78984cf9e6f6ebb7…

MALICIOUS

PDF

75.8 KB Created: 2021-03-19 03:56:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7367188b9383cbc1d12436488265d355 SHA-1: 6046aa6f6fbec2b1ce3f3fe572abd9b098797b5b SHA-256: 78984cf9e6f6ebb7deb4a9b3de05e84f05774320cd29d736ca6a24b33accef4b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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 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://jumiwimov.ru/strik?utm_term=how+to+clean+my+jacuzzi+bathtub PDF link annotation
    • http://wipebodu.mypressonline.com/math_radical_rules.pdfIn PDF document text
    • https://nasotatuji.weebly.com/uploads/1/3/4/3/134392375/lokidubejelijog.pdfIn PDF document text
    • https://riwusivi.weebly.com/uploads/1/3/4/9/134900433/jenariluno-vavuru.pdfIn PDF document text
    • https://jelaxatibepa.weebly.com/uploads/1/3/2/6/132681396/9401388.pdfIn PDF document text
    • http://medebupima.sportsontheweb.net/rebajasazoz.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/diviser_un_en_deux_parties.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/pasawe/nox_app_player_android_emulator.pdfIn PDF document text
    • https://7ef7ebf0-bcb0-4ca2-8538-5a19c3e9f01c.filesusr.com/ugd/aff7ca_bc30fdb1789f4c549d022201598f7a21.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e4fb175-b852-4257-9ed0-8cd6300cc968/werifirajugubiri.pdfIn PDF document text
    • https://e0ff2378-281a-4ea3-95ae-419c526fdc99.filesusr.com/ugd/0baf77_fdde7262822b4cab98f7c32f9566b808.pdf?index=trueIn PDF document text
    • http://sajulugebimisu.myartsonline.com/4102197744.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/ny_dmv_atv_registration_form.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/29151767817.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/borbaad_movie_songs_320kbps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65c2e930-2253-4f97-9a6a-d380b3ea4c7d/a_court_of_mist_and_fury_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/nuvufasopavazutupenavewi.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/3197293912.pdfIn PDF document text
    • https://7ffe38df-ef78-47a1-8632-a9c579db478a.filesusr.com/ugd/8ff694_210fd18c6fa941058ddd1ce09c1e35b0.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA46 5188 bytes
SHA-256: da6c888305e0b336650b2e3f52da63632c92076ca4323c2facea7ed20a566bf9
font_01_sfnt_off0000fbea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEA 11264 bytes
SHA-256: 69d90c92c8d620aadb1087e74aacbadcb4080fb1cf73580519476be6d869db99

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