Malicious PDF — malware analysis report

Static analysis result for SHA-256 79f92e7c24cfd0da…

MALICIOUS

PDF

89.3 KB Created: 2021-05-01 06:35:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b39fbd51e08933c63db9ee8992fb1504 SHA-1: b4f6795473f4abdfa7fd6a36d514875813f8ecdc SHA-256: 79f92e7c24cfd0daa0aa100afb806a8341088a2c042b4797c943e1ba705cd556
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body contains text related to "Adobe premiere pro stops rendering", which is likely a lure to direct users to the embedded URLs. The PDF also functions as a link farm, hosting numerous links to potentially malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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=adobe+premiere+pro+stops+rendering PDF link annotation
    • https://cdn.sqhk.co/gotoruzud/hbjbiji/amc_mobile_movie_showtimes_tysons.pdfIn PDF document text
    • http://coolvdomaion.online/el_bardo_thodol3257j.pdfIn PDF document text
    • https://cdn.sqhk.co/mizipudi/YwicNh3/taredu.pdfIn PDF document text
    • http://xodakarefadivag.iblogger.org/97941931527.pdfIn PDF document text
    • http://fuxezaboxekave.scienceontheweb.net/bojukukofivipiwit.pdfIn PDF document text
    • http://befujukipepejem.mygamesonline.org/avian_anatomy_atlas.pdfIn PDF document text
    • https://cdn.sqhk.co/fasuzozo/hdnEijo/gadesomunivelukere.pdfIn PDF document text
    • http://nirenodeba.medianewsonline.com/jezarigibomawisew.pdfIn PDF document text
    • http://covid-19online.site/22105621789gk6sg.pdfIn PDF document text
    • https://cdn.sqhk.co/feduvefas/3jhgggf/star_beast_endless_idle_tower_defense_games.pdfIn PDF document text
    • https://cdn.sqhk.co/tetolonul/YqIOhcs/38097342367.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cf4de027-7369-46c2-bf93-d69cabef2b5e.filesusr.com/ugd/868b90_e0790b02c011474e8d0bc185b37ca42d.pdf?index=trueIn PDF document text
    • http://tulajadulixo.myartsonline.com/tojewax.pdfIn PDF document text
    • http://tojuzogip.myartsonline.com/bsc_1st_year_syllabus_biology.pdfIn PDF document text
    • https://66c7139a-03c0-45fe-98d3-e817d1e01442.filesusr.com/ugd/de2db5_0d5fafc8fab04ce8a27721617ffd11ca.pdf?index=trueIn PDF document text
    • https://6323cc82-cf72-43ae-bc7a-f8d691a1d37e.filesusr.com/ugd/4f3578_81a288b35c81429ba68d0be152d6fb0d.pdf?index=trueIn PDF document text
    • http://jopatodorijapu.epizy.com/basekevatewoxuna.pdfIn PDF document text
    • https://0298dc5a-7924-4276-8279-06452a5288da.filesusr.com/ugd/b30cf0_591f489e6a7e468e87fb39ae52aacbf6.pdf?index=trueIn PDF document text
    • https://931f52e6-cb68-4a93-8e02-54808d33f8b6.filesusr.com/ugd/6290de_5090c61112f64bb490eaba2216542246.pdf?index=trueIn PDF document text
    • http://tigesafapowe.epizy.com/70487311277.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000112ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112AC 4952 bytes
SHA-256: 468362b9e6ae0e818f0ff1696dc33a3b9ead0d73a13b78675086e22e87e85490
font_01_sfnt_off00012362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12362 11332 bytes
SHA-256: 85755609572681a4de605878ac150e8fde6dd1a94f5fd1d959eed4c6bd545f6d
font_02_sfnt_off000149f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149F2 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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