Malicious PDF — malware analysis report

Static analysis result for SHA-256 2945cd3a913e1d3c…

MALICIOUS

PDF

80.4 KB Created: 2021-03-31 18:02:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 868ac099f7eab80506e4e5f1fec07041 SHA-1: 5b6f1a971371a4c74c5626614efdb85b3e313088 SHA-256: 2945cd3a913e1d3c682ce245501479de92acce47547b8dc4290faa5bf6352bed
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 0.9998

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://seumenha.ru/strik?utm_term=black+sesame+ice+cream+near+me PDF link annotation
    • http://tofotibuwul.sportsontheweb.net/the_caves_of_steel_tv.pdfIn PDF document text
    • http://pogibofabut.getenjoyment.net/27027912968.pdfIn PDF document text
    • http://pemotutafid.mywebcommunity.org/aquarium_fish_types_and_names.pdfIn PDF document text
    • http://eurosett.net/best_sherlock_holmes_book_collectionabjyb.pdfIn PDF document text
    • http://vodoroding.info/what_does_serenity_mean_in_aau6kd5.pdfIn PDF document text
    • http://dvertsoff.ru/how_to_install_twilight_render_in_sketchupab7q8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://02687da8-bf2b-436b-a8ca-82c6e04513a5.filesusr.com/ugd/e48f8a_e93f6d2e73c144feaaf8534c4f8a689a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/sogogoladapivuxo.pdfIn PDF document text
    • https://45180a89-8b92-4d54-a4c6-cdf0ad6af3c7.filesusr.com/ugd/2b98a3_759e9df5b3fd463fabcedbaeeba430d0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuzamada/79416905279.pdfIn PDF document text
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_c3d36f5971fb4e068cd349fb9235ee77.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/hp_w2207h_audio_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/99801383341.pdfIn PDF document text
    • https://8f1ef4f7-3f23-41ef-a3d6-4e5873a175a2.filesusr.com/ugd/d318ce_40b6efb1965e4538b0bdb70f7888fa98.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vutame/acurite_outdoor_thermometer_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/canon_ae-_1_program_repair_manual.pdfIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_55696769eb8c4fa18a85a5f4e81d223e.pdf?index=trueIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_858945123d684aefb6f16184a74d76ee.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE04 4656 bytes
SHA-256: 724c1ba73b02bad02cb17533bfb311f32a2853b99c5708b9537a009aff0e90c2
font_01_sfnt_off0000fda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA2 11516 bytes
SHA-256: 62725ad7421b2d6b7f7d9ff4322f7f63d0dcc7ed3abf9d69bdd9ae4742510c9c
font_02_sfnt_off000124dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DD 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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