Malicious PDF — malware analysis report

Static analysis result for SHA-256 878c04860840223b…

MALICIOUS

PDF

82.4 KB Created: 2021-03-28 16:06:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 04fba9e86862b742b7e1565f9f699363 SHA-1: 4f96b949229828394916d01d58cf59f9a25788b1 SHA-256: 878c04860840223bb646483970de2c73efc727b656392e514fc8c2db0baa154c
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. One prominent URL, 'https://lozipotod.ru/wix?keyword=download+gangstar+vegas+apk+data+revdl', indicates a lure for downloading potentially unwanted or malicious applications. The ClamAV detection and ML classifier further support the malicious nature of this document.

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 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/wix?keyword=download+gangstar+vegas+apk+data+revdl PDF link annotation
    • http://rijebipimaba.getenjoyment.net/95196743861.pdfIn PDF document text
    • https://cdn.sqhk.co/bosamame/igdgiqE/subway_franchise_canada_price.pdfIn PDF document text
    • http://closemaze.com/80430141956sd238.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/PibLjcP/clothes_worksheets_clipart.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://cdn.sqhk.co/togixulala/dpIgcI7/vufesojatozojimodilope.pdfIn PDF document text
    • http://segaruzobuguses.scienceontheweb.net/17480054531.pdfIn PDF document text
    • http://pixxel.life/the_sims_4_cc_folderqgxs7.pdfIn PDF document text
    • https://cdn.sqhk.co/vavuvalegel/55gjdjg/futixadatovojobake.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_b67541ace37140e38c05a3765ba99404.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jigezilor/98198267448.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/share_chat_memes.pdfIn PDF document text
    • https://5bf49506-6ef1-42f8-8f90-7e3689255fd3.filesusr.com/ugd/8fe1bf_9b52d82e78744e28820e73dd8398ae6d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/powerpoint_templates_progression.pdfIn PDF document text
    • https://1138278f-e8d0-45ef-aef3-dbdd7428ac52.filesusr.com/ugd/5be868_1c2a73790a7348eb8ce32a5562792d81.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xeponodij/58675371707.pdfIn PDF document text
    • https://c7f0abc7-d23b-482d-bd16-0771495bb668.filesusr.com/ugd/bb13a2_acb70c42ee424bba8d6a3688fdc7e05b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sizabo/48958595002.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/avital_7111l_remote_start_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/lekidomawurizetumadofabo.pdfIn PDF document text
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_3ef69f8ce3474e37a31d121df6d59bb8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/gojofetosolidom.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/free_handwriting_practice_sheets_nz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECD 5344 bytes
SHA-256: 64c1ef5ada13bc6ba98c07d1c49cab0177dff09f08d6e311bcbc6465fe638bcf
font_01_sfnt_off00010125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10125 5056 bytes
SHA-256: 94b694881813b89239bd93a5679660ea8c9d9744f6eed0604766149cf672bd95
font_02_sfnt_off0001136a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1136A 11172 bytes
SHA-256: 3e83a1396136da1dba6cc897ef85796508b942bf0f958717e1d88cc3f65f4f2d

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