Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c9464b5e30a11b…

MALICIOUS

PDF

88.5 KB Created: 2021-03-21 23:53:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45a30b469f9a408a8c1013a24dc15542 SHA-1: 528834ec02fffe7c55d270a7af60c81760a0555e SHA-256: 01c9464b5e30a11b2a39eede5886e12c9785a7aa6ebe9ab1156b61f9db5c623d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many pointing to PDF files hosted on file-sharing services, suggesting a link farm or SEO abuse tactic. One of these links, 'https://pelibifir.ru/strik?utm_term=garmin+forerunner+305+software', is directly embedded and likely serves as a lure for a malicious download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelibifir.ru/strik?utm_term=garmin+forerunner+305+software
    • https://dosedupuwosiwoz.weebly.com/uploads/1/3/0/7/130776272/8551010.pdf
    • https://futinenapol.weebly.com/uploads/1/3/1/4/131438538/996946.pdf
    • http://ninozefumuwu.iblogger.org/zixapinuvuxemudiwog.pdf
    • https://vejevidumuruje.weebly.com/uploads/1/3/5/3/135302175/ae41ce497f3a7.pdf
    • http://mateguwokalidub.getenjoyment.net/addition_table_worksheet.pdf
    • https://buvurujexo.weebly.com/uploads/1/3/6/0/136082217/vinasanawuxo.pdf
    • http://sunakijabe.sportsontheweb.net/exercises_for_weider_ultimate_body_works.pdf
    • https://zelopira.weebly.com/uploads/1/3/5/9/135990333/5839916.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/fa3b2689-0f46-49e1-9ace-bac1a845238e/kabumoxepovuxibuveromabe.pdf
    • https://uploads.strikinglycdn.com/files/8b69de27-d409-46a9-9aac-258ad7973087/gepepalejopibem.pdf
    • https://uploads.strikinglycdn.com/files/ea8297ec-7c7d-4dd1-89b5-18866b230f3d/pretty_little_liars_free_season_4.pdf
    • http://kunibenurupamiv.rf.gd/sejurivenuseragijuw.pdf
    • http://zideniniwos.epizy.com/proceso_de_cultivo_de_arroz_en_ecuador.pdf
    • https://uploads.strikinglycdn.com/files/2b4b023f-7bbd-4cd1-8faa-f7f1d7195347/wajulapunudore.pdf
    • https://uploads.strikinglycdn.com/files/331c28dc-5d62-424b-bd08-4b33fef7893a/miniature_dachshund_puppies_for_sale_ca.pdf
    • https://uploads.strikinglycdn.com/files/c77e8f4b-a0ca-4213-bf99-1ae54321a186/94748505461.pdf
    • http://wulibazosuxib.onlinewebshop.net/83021748447.pdf
    • https://uploads.strikinglycdn.com/files/b959b101-ec33-4091-91f6-c7cc4b8166ce/95851172810.pdf
    • http://potaxupixikubud.rf.gd/septic_shock_in_neonates_guidelines.pdf
    • https://uploads.strikinglycdn.com/files/c29bf975-fcbd-4630-88fb-7bc23e103c02/death_cure_plot_summary.pdf
    • http://bibubojudij.rf.gd/spanish_english_dictionary_offline.pdf
    • http://bodirinukamole.onlinewebshop.net/nubofoli.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001059c.bin
d122cb2c7dba3ee559994cbcd74557d98995712e62d1ecc0920495e058ed2f70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1059C 5316 bytes
font_01_sfnt_off000117a4.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117A4 1800 bytes
font_02_sfnt_off00012032.bin
581de6f0f4c9658bba58fa291d58684cf375045d1b9ab91fc4ef287e4747beb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12032 11060 bytes
font_03_sfnt_off00014610.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14610 4324 bytes

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