Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d42ecebf17f3116…

MALICIOUS

PDF

75.0 KB Created: 2021-04-03 09:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7c25120880c5bf9d2f3824c141c84f0d SHA-1: c679922e4b438a57d707de79086b348febce6bec SHA-256: 2d42ecebf17f3116fd4e8b020e6d6fa12f1f3b461675066ef399199431b40874
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8808

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.
  • 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
  • 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://baarspo.ru/award?keyword=fluorescence+spectroscopy+pdf PDF link annotation
    • https://cdn.sqhk.co/rufopunuk/BhbrDz1/soccer_player_dies_on_field.pdfIn PDF document text
    • https://cdn.sqhk.co/filemowa/FEhcwgd/sekuke.pdfIn PDF document text
    • https://cdn.sqhk.co/bejamisokepu/8Nejgja/standoff_2_mod_menu_2020_android.pdfIn PDF document text
    • https://cdn.sqhk.co/vitikitema/aimjhEu/muwafezope.pdfIn PDF document text
    • https://cdn.sqhk.co/givikofuf/ahfheha/myaicampus_student_login.pdfIn PDF document text
    • https://cdn.sqhk.co/bugabowozi/byRuij1/cooking_processes_and_technical_terms_crossword_answers.pdfIn PDF document text
    • https://rudabukonavapuk.weebly.com/uploads/1/3/4/0/134016662/500997.pdfIn PDF document text
    • https://ririsibonegibo.weebly.com/uploads/1/3/4/5/134596323/4af2a855c63fa.pdfIn PDF document text
    • https://zorutamazu.weebly.com/uploads/1/3/4/0/134096431/timarojuf.pdfIn PDF document text
    • http://xagakojitogiva.getenjoyment.net/giteketobun.pdfIn PDF document text
    • http://piriveva.scienceontheweb.net/searching_for_sunday.pdfIn PDF document text
    • http://sinoxaju.mygamesonline.org/supemevelav.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/eOIfcMA/flying_penguins_bbc_news.pdfIn PDF document text
    • https://sejumajofejopib.weebly.com/uploads/1/3/2/7/132740214/499588.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bebezira.epizy.com/what_does_the_bible_say_about_torn_clothes.pdfIn PDF document text
    • http://keregimuw.onlinewebshop.net/caves_of_steel_tv_tropes.pdfIn PDF document text
    • http://vigadibomo.rf.gd/is_tokyo_ghoul_good_for_12_year_olds.pdfIn PDF document text
    • https://4900ecec-7ac1-411c-be2c-b077674085c8.filesusr.com/ugd/493135_763933503ee9427fb076c262e425056f.pdf?index=trueIn PDF document text
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_6822c8609f1e4ad7864098719c1d478b.pdf?index=trueIn 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_off0000f8ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EC 4996 bytes
SHA-256: 9c55e28ec0a493bee340fe9d92317c9946367d9554f134d66f283629c42b9b90
font_01_sfnt_off00010a0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0C 11016 bytes
SHA-256: 263e70921399d88d10199e396220b11027600883686f617d179866f5854067fd

Open this report in the interactive analyzer, or submit your own file for analysis.