Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe39798492f67b46…

MALICIOUS

PDF

71.9 KB Created: 2021-04-13 21:50:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 80635333fa819e52a57839597e272e06 SHA-1: 6aa45c8773ead6144a45d5768a5aa094853636e3 SHA-256: fe39798492f67b46de69c34a62721f741cb06ada5818cb3ee1f483e4c85ce7ca
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic PDF_SEO_LINK_FARM indicates a large number of links, and the ML classifier strongly suggests malicious intent. While no scripts were explicitly extracted, the PDF structure and external link farm point towards a malicious document, likely a phishing lure or a downloader for a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/strik?utm_term=whirlpool+dishwasher+repair PDF link annotation
    • https://tanibabinilez.weebly.com/uploads/1/3/4/0/134018029/6376249.pdfIn PDF document text
    • http://mkr-olimp.info/capitalization_and_punctuation_worksheet_answersd6064.pdfIn PDF document text
    • https://cdn.sqhk.co/babonisu/hdggcij/aarp_freecell_solitaire_card_games.pdfIn PDF document text
    • https://jodisugej.weebly.com/uploads/1/3/4/7/134732418/4400331.pdfIn PDF document text
    • https://cdn.sqhk.co/wapogade/gnhiZje/form_of_sainik_school.pdfIn PDF document text
    • http://nofosofeze.iblogger.org/best_automate_app_android.pdfIn PDF document text
    • http://mestorating.ru/cfc_intercessory_prayer_bookletyzsfu.pdfIn PDF document text
    • http://modebedunizux.iblogger.org/j_angielski_czasy.pdfIn PDF document text
    • http://filemarker.store/rihanna_all_songs_free_mp3_downloadjv40u.pdfIn PDF document text
    • http://cafe-cok.ru/titajarowenipowamuw4fpc6.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/fedure/xulazi.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/cerfa_13757_x_03.pdfIn PDF document text
    • http://darelarara.epizy.com/16841125461.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/smoke_png_for_picsart_free.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/40983575396.pdfIn PDF document text
    • http://xutulatovemi.epizy.com/vadudiwunubajorodijox.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/videos_para_aprender_ingles_gratis_para_principiantes.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_off0000dcdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDF 5152 bytes
SHA-256: 3b52722f61e6ce424e63f1f42c8a679fd26ef78c961a9121e77821bc4673a23c
font_01_sfnt_off0000ee71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE71 10476 bytes
SHA-256: 87aad7074837a94dab2053fd71971e4ff381d27d730c826debd4db6e45939eba

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