Malicious PDF — malware analysis report

Static analysis result for SHA-256 712a51de69320764…

MALICIOUS

PDF

96.1 KB Created: 2021-04-07 15:17:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: e7e96ee5a49701571f48b147f74574b8 SHA-1: cf2b46e3043cebb4c8b64af2aea82346882c9331 SHA-256: 712a51de69320764ef97eb7c6c7a79e12d09f870fc48015dd175efd34e9c3902
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One of the primary external URIs, 'https://mezovuduw.ru/123?utm_term=adyaksha+kannada+movie+free', is flagged as suspicious. ClamAV also detected the file as 'Pdf.Phishing.Trojan'. The presence of external links and the phishing detection suggest the document is designed to redirect users to malicious sites, likely as part of a phishing or malware distribution campaign.

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://mezovuduw.ru/123?utm_term=adyaksha+kannada+movie+free PDF link annotation
    • https://cdn.sqhk.co/nugutobudan/jeyhhSD/street_art_graffiti_masters.pdfIn PDF document text
    • https://cdn.sqhk.co/zizenozi/e4gjuic/rujulenowezilepinozizaw.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/D8ifij3/27208998277.pdfIn PDF document text
    • https://cdn.sqhk.co/fiporalisu/3Zhg7hb/commander_s_palace_new_orleans_thanksgiving_menu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://314f4944-3dd9-45af-b5ee-fc7f46c963e4.filesusr.com/ugd/73cb9e_0371141213c944df8e211361675e2a11.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b68ccc81-a017-44a3-a617-43b072480c67/38780301189.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/89752764156.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/nozebijilitaxawugulelizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e4edd24-f632-4c4d-84e7-c893c9fe4766/47321375296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f88111c-c5a6-4956-9886-5bb729abd097/numerical_recipes_in_c_3rd_edition.pdfIn PDF document text
    • https://71347f20-8353-4153-bebc-dd2a28b3a5cf.filesusr.com/ugd/a382ee_bea2dc01623145afad702534622c7163.pdf?index=trueIn PDF document text
    • https://1fc3e790-19e1-43b7-bae7-d09a953f51fe.filesusr.com/ugd/2c608b_55b8b815598444b99d46ffaad2a0b1c9.pdf?index=trueIn PDF document text
    • https://5db246a0-94da-4013-9f64-c970003367b9.filesusr.com/ugd/ca5179_04887b4ebb6d44769a8dbfada147090b.pdf?index=trueIn PDF document text
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_9a8f9f79a820443e837c48cf139b8442.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muvarelo/30775326056.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/multiplication_as_repeated_addition_worksheets_year_2.pdfIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_dcd5f533b1374058ab41b6174b7a9f35.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/rewixakudepogijiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/logic_puzzle_apps_for_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/canon_ip2700_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04e9e423-5405-40df-8e4b-f393bf5a4565/gemini_alarm_system_battery_replacement.pdfIn PDF document text
    • https://c02a3fa2-970f-4384-b4fa-7a60184a1b73.filesusr.com/ugd/1da3fe_f2ba6abd5db9462cb2af681ac5a844c9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wemazun/tidare.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_off0001396c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1396C 5332 bytes
SHA-256: 13aa0be6ca2a2cb54c50637192f32254c9a6b4c6a75a8b9741e5465edf1554e8
font_01_sfnt_off00014b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B77 10948 bytes
SHA-256: d001f90b1d5c9582d511a7528e01330dd58f273ef52e89f83d0763480d9375fb