Malicious PDF — malware analysis report

Static analysis result for SHA-256 e342d7e4e0a0d465…

MALICIOUS

PDF

76.1 KB Created: 2021-03-21 06:44:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 612a751b76463407c433cf1d1e860e6b SHA-1: 81975f1ff1ae21b3c5343ebc9d342d2ca58bc89e SHA-256: e342d7e4e0a0d465a16c09c2766d0dd308201ef48c697ef9d1ab092a0c5ef906
126 Risk Score

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 0.9992

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 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://xajibur.ru/strik?utm_term=come+up+to+meet+you+tell+you+i%2527m+sorry+mp3+download PDF link annotation
    • http://tanivikovome.sportsontheweb.net/nissan_almera_tino_service_manual.pdfIn PDF document text
    • http://zagejudivavi.sportsontheweb.net/navien_flow_sensor_problems.pdfIn PDF document text
    • http://xexejevun.medianewsonline.com/bazuvenubi.pdfIn PDF document text
    • http://beststudent.space/crazy_climber_atari_2600p6yeg.pdfIn PDF document text
    • http://kudretbozaci.com/gedawamu5qxfg.pdfIn PDF document text
    • http://viruxego.mygamesonline.org/sabejinalexopezowe.pdfIn PDF document text
    • http://xteenware.online/fobaxukawafababafqr71.pdfIn PDF document text
    • http://mushygushysayings.com/anlet_roots_blower_maintenance_manualuay1q.pdfIn PDF document text
    • http://xanusojuruxu.sportsontheweb.net/agrochemical_pollution.pdfIn PDF document text
    • http://dosijefa.mypressonline.com/wijorawidoxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2a009ac4-5770-49f2-ae16-4ce107243443.filesusr.com/ugd/59deca_981c17f6d32e447ba52978c1e08cf257.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/easy_guitar_tabs_for_christmas_songs.pdfIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/64955814563.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/75148057454.pdfIn PDF document text
    • https://e53c8fcc-339b-4d8f-83f6-44ddc8c6ace4.filesusr.com/ugd/1ea9c4_1d228a157f61403d9f5d91c1d161e04d.pdf?index=trueIn PDF document text
    • https://7fd92c66-d3af-485c-b7a9-31529ddfb1b5.filesusr.com/ugd/997d0f_1fd9f132d92b4ce78888392a2e58794b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/94351059529.pdfIn PDF document text
    • https://d8ec88ce-93b1-4b83-b294-7016fd5b5063.filesusr.com/ugd/366252_e51facfc16aa435fac2cf5dd80594572.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/marketbeat_best_stocks_under_10.pdfIn PDF document text
    • https://9f53eded-325d-4e02-8430-7c09bd872488.filesusr.com/ugd/e04405_5d6abad8e2b44c3eb287651333b718f1.pdf?index=trueIn PDF document text
    • https://8c0e102b-efba-4641-b7fc-347c26357927.filesusr.com/ugd/d420ee_7e515f8663974395add5154696912c4c.pdf?index=trueIn PDF document text
    • https://3d6da986-5be3-4955-9d5c-e891e6c56a45.filesusr.com/ugd/3c671a_2c67802a9d404a5ba7a1ce20896d6dcb.pdf?index=trueIn PDF document text
    • http://zowofiz.myartsonline.com/animales_para_colorear.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_off0000e684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE684 5404 bytes
SHA-256: 979f5d2429b86d3a21c48c9a8ad114939ce241288d648b9c9a50d190212ac529
font_01_sfnt_off0000f8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E4 12860 bytes
SHA-256: f922746e6af39ebec829191626a7485d844764d818382a6c6ce006b35505d212

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