Malicious PDF — malware analysis report

Static analysis result for SHA-256 17930c1b9f962173…

MALICIOUS

PDF

80.1 KB Created: 2021-03-29 16:56:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 0f78c5fe0bb8e8341294f9aa016faf5c SHA-1: 493fbd692aea7def2b4e7a9b41a3cd928fba7735 SHA-256: 17930c1b9f96217364f1b9dbf5dfa8f15dc89d3ce6d7b615c41b8cd2d94900a5
96 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, indicating a phishing or trojan-like behavior. It contains an embedded URI pointing to 'jacksth.ru', likely intended to redirect the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit users through deceptive content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=sennheiser+xs+wireless+digital+xlr+base+set PDF link annotation
    • https://rikatawifusozib.weebly.com/uploads/1/3/1/4/131409861/woseku-nigudi.pdfIn PDF document text
    • https://fapotuseji.weebly.com/uploads/1/3/4/7/134712372/2253322.pdfIn PDF document text
    • https://jileninaniwepuz.weebly.com/uploads/1/3/4/7/134771173/4c7ce38.pdfIn PDF document text
    • https://cdn.sqhk.co/todiwapubu/XhfXdkf/libro_el_cerebro_de_buda.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxiropuwomo/ifUTXN9/tujuxinunax.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/hh9gjgg/nhl_standings_2018-_19_overall.pdfIn PDF document text
    • https://roxunasof.weebly.com/uploads/1/3/4/3/134312726/jekuvebiwamawu.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/9gTkeid/tivowowivarasov.pdfIn PDF document text
    • https://cdn.sqhk.co/bufudoraxala/haibW1Q/10284876604.pdfIn PDF document text
    • https://cdn.sqhk.co/jawutuwek/hey47jg/figede.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sudewepizetego.epizy.com/basso_ostinato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23c92a01-d1b6-44f4-b575-b2065afd1500/loxanolifebe.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/wuzunumojuniberi.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/corporate_law_reporter_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed5e87c8-6513-4eb5-9f98-f701f4731565/daniel_fast_recipes_and_menu_planner.pdfIn PDF document text
    • http://bapomel.epizy.com/kitchen_interior_design_website_templates.pdfIn PDF document text
    • http://mukefozude.rf.gd/chefschoice_4643_prontopro_diamond_hone_manual_knife_sharpener.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/35512081007.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/super_usb_cassette_capture_driver_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/accurip_1._01.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9fc58e2-9158-467a-bfb9-ce3fdc7ed4ef/how_to_use_a_t-fal_clipso_pressure_cooker.pdfIn PDF document text
    • http://tuxesoguzegisox.epizy.com/jotul_602_cb_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef05fd42-894d-4147-8431-9fa8620c859d/14296278465.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_off0000f64e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64E 5492 bytes
SHA-256: 7ea6cbacdd2d96a8a345a2ee7bd18fa0cfd9b0ddeb6ffca3a2bc59968fdb1c8d
font_01_sfnt_off00010905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10905 12628 bytes
SHA-256: fb4c1b467a4d066c06c600a7c8365a4a73edfe98de33e4c3f70c1e15f22a47fc

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