Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b4a90ef9d28fd9c…

MALICIOUS

PDF

77.0 KB Created: 2021-03-18 00:06:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b804bf1c771ccf28d817f4157b841808 SHA-1: db960941027159f38c269d3f60cae7607f443fba SHA-256: 8b4a90ef9d28fd9c3d31a1b6f9d90f5a985060b966acafa24d7e4279432185fa
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique commonly used for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=can+you+get+hot+chocolate+nespresso+pods
    • http://ecoservice-vlad.ru/54482556939nrb2l.pdf
    • http://skidki-day.store/how_to_make_a_shooting_target_stand0hglr.pdf
    • https://xutifapob.weebly.com/uploads/1/3/2/7/132712150/7be896180.pdf
    • http://migerov.xyz/teoria_de_aperturas_ajedreznm6j3.pdf
    • https://bavipakodotem.weebly.com/uploads/1/3/5/9/135958795/jofobuwomajenerex.pdf
    • http://apparentlyopt.com/69850621981n6gjy.pdf
    • https://mekumago.weebly.com/uploads/1/3/5/9/135981587/4731876.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/tamovagag/vaastav_ganesh_aarti_song.pdf
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_d7b5bb49d09345adbb66956fdd574b5f.pdf?index=true
    • https://s3.amazonaws.com/jutenojamega/mojavuvilulojebumatojada.pdf
    • https://s3.amazonaws.com/mudurixo/89578109970.pdf
    • https://0feddc0e-03bc-46a3-a741-45303deff239.filesusr.com/ugd/6ea6a2_90a4c1eb0dd74632b7ee07ee10e8d65f.pdf?index=true
    • https://77047a80-9f17-4504-a563-a097c25ca12e.filesusr.com/ugd/5c8b2f_f6674edd46364012aa2a2247d928a51f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8bbf7b7f-5ec4-4423-8f86-9e10e4ffa9dd/xowegetaxi.pdf
    • https://uploads.strikinglycdn.com/files/a7755d21-27d9-4b0e-ab04-92086f406edd/4_elements_of_film_style.pdf
    • https://1cd0d4d5-11d4-440c-a307-81f73801f601.filesusr.com/ugd/f0e51d_a897878dc5354b5683adedd7c15073d0.pdf?index=true
    • https://s3.amazonaws.com/tamobalasu/wipaba.pdf
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_c10baf20d6984ba1a9afd792db916f85.pdf?index=true
    • https://s3.amazonaws.com/nemafu/i_ll_fly_away_sheet_music_guitar.pdf
    • https://s3.amazonaws.com/bulujono/ivoclar_vivadent_bleach_shade_guide.pdf
    • https://s3.amazonaws.com/pizivurapab/20990033548.pdf
    • https://s3.amazonaws.com/xunilukegez/como_hacer_amigos_e_influir_en_las_personas_completo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0f7.bin
95f6df5b7aef7b2e9447c7f341958865286f9ed17146151370c7fa905307d76e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F7 5296 bytes
font_01_sfnt_off0000f2fd.bin
979bc05ece1415eccc6ed7089ef2187a3dfa85ba314340a057ba706aed7d27c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FD 10420 bytes
font_02_sfnt_off00011694.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11694 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.