Malicious PDF — malware analysis report

Static analysis result for SHA-256 856fdf794effb9a6…

MALICIOUS

PDF

76.5 KB Created: 2021-03-26 08:18:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f457cd428d960b7a3d7c552df2c05645 SHA-1: 7c892824321868048fe07b1926e23e05415c8db9 SHA-256: 856fdf794effb9a6060fb10a96153fb84003c0c34d9d60ed32e839e30984e458
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a link farm and an embedded URI pointing to 'lozipotod.ru', suggesting a phishing or malicious content distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this, indicating the file is designed to deceive users into downloading further malicious content or revealing sensitive information.

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://lozipotod.ru/award?keyword=ketogenic+diet+pdf PDF link annotation
    • https://cdn.sqhk.co/tupujokuz/cE5rEx3/spinner_io_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/oZVhjif/online_mobile_recharge_idea_full_talktime.pdfIn PDF document text
    • https://cdn.sqhk.co/xefilelo/ajgMmif/pinata_hunter_3_hacked.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7ffe38df-ef78-47a1-8632-a9c579db478a.filesusr.com/ugd/8ff694_818406f8022e43508162240eef30ef36.pdf?index=trueIn PDF document text
    • https://ef2e072a-e8a2-4438-804d-cc750be2e2f6.filesusr.com/ugd/6a22cb_7f2e646923b1453b803138e8649701b2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/farowug/why_is_my_computer_not_loading_certain_websites.pdfIn PDF document text
    • https://e60c805d-b9e1-47fc-b045-983511e9ac1f.filesusr.com/ugd/116bb2_40c9942196ab4ab89c31e17691523f60.pdf?index=trueIn PDF document text
    • https://f05e0dbb-21cf-40ea-8b71-00b8d6f49a3b.filesusr.com/ugd/b09e1d_a9ffe5c9098745a7bd68227e082fe361.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/47611720401.pdfIn PDF document text
    • https://23da7c74-6e14-424a-b22a-901aa35eafb1.filesusr.com/ugd/9cc572_1ee86712464e4f4e970b431b1b78789f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/star_wars_edge_of_the_empire_core_rulebook_free_download.pdfIn PDF document text
    • https://50b7e5d6-ab0e-41ff-bbcb-47d024e5c277.filesusr.com/ugd/45d8ab_75578d358e83494aa8bcb2de6a849aaa.pdf?index=trueIn PDF document text
    • https://d5cf7a15-73c9-49c9-ad57-d4f0303abb0c.filesusr.com/ugd/0d002d_38832c3ba7b1417d95d9d7bad1478cbb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/begaru.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/fender_hot_rod_deluxe_speaker_ohms.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/82188371522.pdfIn PDF document text
    • https://s3.amazonaws.com/wujanozo/xidugadiwovigunida.pdfIn PDF document text
    • https://765a5d72-5774-4a4d-a421-5c90307110ba.filesusr.com/ugd/f2a868_e1e974b3f05c4c0a886f5e63c7fe4e31.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/79086414980.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDED 4776 bytes
SHA-256: ef9835c1eb4e35f8c7f4d33706d1ff0f8b418c6ce76451f15f6e50f8fbfff8fd
font_01_sfnt_off0000fe59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE59 10984 bytes
SHA-256: bfa3d2adb8224809a5fea3c6c73a44cea311a94656f57ba332417811ffdeb9c2

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