Malicious PDF — malware analysis report

Static analysis result for SHA-256 059e48109f02eab6…

MALICIOUS

PDF

73.2 KB Created: 2021-05-01 16:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: db1c44fffd990bd66b6ea8a034315841 SHA-1: 212512e9d247f999a32abe8a8b1005998bdfa73e SHA-256: 059e48109f02eab627dfef50b3dce0ee3bc068487b27f079d405b1c1bdbca2ce
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains a large number of embedded URLs, many pointing to disposable or unknown domains, suggesting a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this phishing or redirection attempt.

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 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://jumiwimov.ru/strik?utm_term=tri+tronics+classic+70 PDF link annotation
    • http://zurabutodiriwa.22web.org/52194297624.pdfIn PDF document text
    • http://instgramcopyrightdispute.com/gofaripukamigenewisam639z.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/0XHhgih/sports_board_games_facebook.pdfIn PDF document text
    • http://katipef.medianewsonline.com/kixogamemev.pdfIn PDF document text
    • http://about-fb-support.com/damulorojudekemofavuxubo3psmo.pdfIn PDF document text
    • https://gutoxokotuvil.weebly.com/uploads/1/3/1/3/131380594/6722787.pdfIn PDF document text
    • http://letnesil.xyz/2699928452qqnz3.pdfIn PDF document text
    • http://trysucre.pro/42988215467nwcky.pdfIn PDF document text
    • http://tokesuditetu.getenjoyment.net/44382250577.pdfIn PDF document text
    • http://kobodesuwid.getenjoyment.net/33157379930.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/jfheoif/17273425984.pdfIn PDF document text
    • http://nunesop.scienceontheweb.net/cessna_421_parts_manual.pdfIn PDF document text
    • http://study-english-05.site/alarm_clock_sound_onlinevec5q.pdfIn PDF document text
    • https://cdn.sqhk.co/bupewazadufa/OCiaDhi/63302367573.pdfIn PDF document text
    • https://nerapusu.weebly.com/uploads/1/3/1/4/131438180/roreve-jiregetafubi-putimujegomo-lefedagikabe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c951641-1b8a-4a72-ab40-cc1eeccad8d8/how_the_grinch_stole_christmas_song_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5a40cc3-4e5f-4b0c-9d87-45b5be43af1c/your_grace_is_enough_chris_tomlin.pdfIn PDF document text
    • http://bukuzem.rf.gd/brc_mesh_full_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edaa221f-26a0-4ba4-91c6-180d9b152a14/waniwigugazined.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_off0000e231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE231 4964 bytes
SHA-256: 61b5428bae797f42cd2a98a9c8ff1be589abd39227cc6c00e45dde65a643c81f
font_01_sfnt_off0000f324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF324 10848 bytes
SHA-256: 9a8fdcf564cd5e20180ab3381988f0c5af61c97725e56a1f8b075df9a7d034d6

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