Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbedfccaf0e3ba3a…

MALICIOUS

PDF

73.3 KB Created: 2021-03-06 04:41:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a572c87ccd11f700c9a6e78cc4446733 SHA-1: 10673bd8356d0bd320f8d6a6936fed97afc2fe67 SHA-256: dbedfccaf0e3ba3a660d423c285cfa268bcf581da6020ab4a18ea0860ea119f9
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a large number of external links, suggesting a link farm or phishing attempt. The ML classifier and ClamAV also flagged the file as malicious, specifically as a phishing trojan. The embedded URL and the PDF link farm heuristic indicate an attempt to redirect users to malicious or spam content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/123?utm_term=aps+fee+schedule+2021 PDF link annotation
    • https://cdn.sqhk.co/vofonowul/3Mlbif3/fifa_world_cup_2022_africa_groups.pdfIn PDF document text
    • http://com-servers.online/best_car_simulator_games_2020jn4m5.pdfIn PDF document text
    • https://cdn.sqhk.co/wozejodes/ThhHiaV/radio_italia_lista_musica.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/37999884035.pdfIn PDF document text
    • http://baranaydin.org/kierkegaard_either_or_meaning8gtsn.pdfIn PDF document text
    • https://cdn.sqhk.co/nefakovuwot/higjqFt/47093495348.pdfIn PDF document text
    • http://zopokujejisolan.getenjoyment.net/integral_of_csc23x.pdfIn PDF document text
    • https://porepegozid.weebly.com/uploads/1/3/6/0/136050151/958e71ad6.pdfIn PDF document text
    • http://sacredname.ru/answer_back_with_attitude_crossword1s39s.pdfIn PDF document text
    • http://health2health.online/rarekutajudupalelibite35a.pdfIn PDF document text
    • https://wotowabe.weebly.com/uploads/1/3/4/6/134688823/kazir-karekivize.pdfIn PDF document text
    • http://rezexepenoma.scienceontheweb.net/fikazosogenofupex.pdfIn PDF document text
    • https://mazanotofubemiz.weebly.com/uploads/1/3/2/6/132681192/razozad.pdfIn PDF document text
    • http://xtreme-sport.ru/74810925315finlx.pdfIn PDF document text
    • https://radunepik.weebly.com/uploads/1/3/4/6/134617153/4483187.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sewamos/sulezokolivogirufen.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/24505127637.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/lawn_boy_10685_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/sogc_guidelines_abnormal_pap.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/40534804567.pdfIn PDF document text
    • http://jatoxat.atwebpages.com/21876714219.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/gedemujotefoxakikaxowem.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/business_plan_template_ireland_free.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_off0000e1e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E0 5252 bytes
SHA-256: 14538261d70bc6e8b4eee5d3e08513b72770cf41e441a349298fa7ea22835426
font_01_sfnt_off0000f3cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CF 10492 bytes
SHA-256: a7d4d0c2159b4412c13ff95e7fd24ca3f8fad7779925ef1e35a64d3fdc1c7d5e

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