Malicious PDF — malware analysis report

Static analysis result for SHA-256 da20f93647321c0b…

MALICIOUS

PDF

75.4 KB Created: 2021-04-01 08:19:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 95062b844ec388624bebc5c8eef49a25 SHA-1: fad32317360c3985637f581acd4d13fa9c7a3d66 SHA-256: da20f93647321c0bc0e8767146db57b00c13ead38170d4700026a052cb8a73c0
166 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ML classification and ClamAV detection. It contains numerous embedded URLs, many of which point to disposable domains and are structured as a link farm, suggesting a phishing or malware distribution attempt. The 'Password-protected archive handoff' heuristic indicates that the document likely contains instructions to decrypt or access a payload, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://seumenha.ru/award?keyword=adobe+pdf+creator+mac+free PDF link annotation
    • https://mokitapakajare.weebly.com/uploads/1/3/4/8/134885173/bc63af81dcd67.pdfIn PDF document text
    • http://1fps.ru/xolozofinqceo4.pdfIn PDF document text
    • http://003-center.ru/usda_nutrition_label_guidelinesx8qtn.pdfIn PDF document text
    • http://uchebnoe.website/96369931486adgyu.pdfIn PDF document text
    • http://abreudesigns.com/ark_survival_evolved_key_activation0h2a4.pdfIn PDF document text
    • http://tophomework.space/zatobulajupibisokizin5ha.pdfIn PDF document text
    • http://interior.estate/kitchenaid_artisan_mini_stand_mixer_salejxawf.pdfIn PDF document text
    • http://fartook.online/fimimej53tj.pdfIn PDF document text
    • http://buybritishcat.com/xazofuz7sli.pdfIn PDF document text
    • http://health-top.ru/amrita_nayak_new_odia_songnzfx0.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://welaxulisura.weebly.com/uploads/1/3/4/0/134042468/xuxuzosu-jawuwamogit.pdfIn PDF document text
    • http://ideaita.fun/40796394318qm0dn.pdfIn PDF document text
    • http://tikovg.xyz/xilutupurisozidabusamajauzhhm.pdfIn PDF document text
    • http://japancar-sib.ru/318080639256juz2.pdfIn PDF document text
    • http://naturaleone.space/simple_chat_application_in_android_using_firebasecjysu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ditajizuru.rf.gd/nezufukibosikerujimoxorop.pdfIn PDF document text
    • http://xesapekaf.epizy.com/zaredupiw.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/ccleaner_software_for_pc_free.pdfIn PDF document text
    • http://mitadur.epizy.com/application_letter_for_driver_position.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/rosepifa.pdfIn PDF document text
    • http://faluzaxubip.epizy.com/informacion_sobre_caballito_de_mar_para_nios.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/34554539891.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_off0000e7d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D9 5220 bytes
SHA-256: f463be0c62ff935429f801e27ccd6463f84129155770ffc7dd694f0d200750dc
font_01_sfnt_off0000f987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF987 11964 bytes
SHA-256: 0ac657c217bd71d2bd8a3dd8ec5447bd1f9eea53a4f0939ba7cf89a376bd046a

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