Malicious PDF — malware analysis report

Static analysis result for SHA-256 e552bd632a4f580f…

MALICIOUS

PDF

69.6 KB Created: 2021-03-11 11:05:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e1989e65025e9a21fb23e7c13b348b5 SHA-1: 268d0ed23fec8a31887b14f541f853c50d9632b9 SHA-256: e552bd632a4f580f33e8ad664c123b86b8c240d3eb15163cee117e4b48cd3394
96 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier returned a high probability of maliciousness. The PDF contains embedded URLs, one of which is https://golowaki.ru/123?utm_term=probability+worksheet+year+8, suggesting a phishing lure related to educational materials. While no scripts were explicitly extracted, the presence of embedded URIs and the overall detection profile indicate the PDF is designed to lead the user to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/123?utm_term=probability+worksheet+year+8
    • http://sosed.market/600202331379abjw.pdf
    • https://cdn.sqhk.co/simumufij/ii0jeRK/modifitunididu.pdf
    • http://filemarker.store/campbell_biology_11th_edition_textbooks33gb.pdf
    • https://cdn.sqhk.co/ruwonumatag/aiiI6gf/ballz_deep_ipa.pdf
    • http://zoxuruje.sportsontheweb.net/65364778174.pdf
    • http://kneeksi.ru/solitaire_ring_with_double_wedding_band7drm5.pdf
    • https://cdn.sqhk.co/tisorobew/bjhdMih/graphing_quadratic_functions_guided_notes.pdf
    • http://graatorama.space/when_you_care_too_much_quoteshnra0.pdf
    • http://ludesajezopaju.medianewsonline.com/mobomi.pdf
    • http://usacreditreport.info/south_carolina_dmv_office_near_mep0g8b.pdf
    • https://cdn-cms.f-static.net/uploads/4498893/normal_5fd8772e5ddfb.pdf
    • http://menformula.xyz/birotosvvtq.pdf
    • http://iuts.space/remington_14_inch_limb_and_trim_partsl3s16.pdf
    • http://tapovapusewirol.iblogger.org/47732154136.pdf
    • https://cdn-cms.f-static.net/uploads/4473035/normal_600b8f5925fc7.pdf
    • https://static.s123-cdn-static.com/uploads/4404753/normal_5fe4282513224.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jirikefo.epizy.com/polycom_vvx_410_handset.pdf
    • http://vekoxoke.epizy.com/movie_er_website_for_pc.pdf
    • http://mobotifiriw.epizy.com/calligraphy_practice_book_michaels.pdf
    • http://gegurobaz.myartsonline.com/evenflo_litemax_dlx_infant_car_seat_reviews.pdf
    • http://newabef.rf.gd/braun_thermoscan_manual_po5.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4af.bin
a6370281153ceb4b461d2db8541d0336caf92f854ae56476b460fefa2feb711e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AF 5368 bytes
font_01_sfnt_off0000e6f8.bin
9512d505796fff151abf73980f16bc98cd3288cf5715d696648538244a815784
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F8 10148 bytes