Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d0012febe83695…

MALICIOUS

PDF

77.7 KB Created: 2021-03-12 20:17:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6240ce660dee7ac21eb9690844abb3f4 SHA-1: b2ad7f6194f7b183ab210a8e1cd165af60e5890f SHA-256: 47d0012febe83695dbc1aacb1da282674116323e839377c762712c5d54d0fe83
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI that points to a suspicious domain, identified by ClamAV and ML classifiers as malicious. The document body, though heavily obfuscated, appears to be related to a medical topic, suggesting a lure. The presence of an external URI indicates an attempt to redirect the user to a potentially malicious site, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/award?keyword=cierre+tardio+de+fontanela+anterior+pdf
    • https://cdn-cms.f-static.net/uploads/4405459/normal_60175cb512c3b.pdf
    • https://static.s123-cdn-static.com/uploads/4378175/normal_5fe21b3f06677.pdf
    • https://zonilalafujagep.weebly.com/uploads/1/3/4/7/134731182/9655990.pdf
    • http://bobixina.getenjoyment.net/reggae_phb_2020.pdf
    • http://kikifikoxije.mypressonline.com/what_is_daybed.pdf
    • http://smm-target.ru/we_wish_you_a_merry_christmas_sheety13ex.pdf
    • http://milanbeach.fun/80339080527tw74g.pdf
    • https://wovovude.weebly.com/uploads/1/3/1/3/131397940/detuse.pdf
    • https://fuviwamirami.weebly.com/uploads/1/3/5/3/135351498/minipavuw_wabul.pdf
    • http://m-laskin.ru/fakesidatejurabibomozx6fl.pdf
    • http://lnstagramsupportinfo.com/the_case_for_christ_study_guide4i5qz.pdf
    • http://milanomoda-italy.site/tasufavafixetevej2rvl.pdf
    • http://shoop-fn.ru/kedovukadetijidux63y33.pdf
    • http://setopin.mypressonline.com/natural_products_that_target_cancer_stem_cells.pdf
    • http://verification-help.com/diagrama_de_clases_online_freenqgnj.pdf
    • http://wobafobigo.mywebcommunity.org/slope_of_parallel_and_perpendicular_lines_worksheet.pdf
    • https://lasapiboxemifol.weebly.com/uploads/1/3/4/8/134865682/2313169.pdf
    • http://rupazaduxil.mywebcommunity.org/78623489547.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/eae1f5dd-67a0-4eb9-a224-4071d1644fc1/sig_p938_nightmare_review.pdf
    • https://uploads.strikinglycdn.com/files/f3a8d113-773c-4c24-83f2-69b3cda2bf45/how_to_reset_fossil_gen_4_watch.pdf
    • https://uploads.strikinglycdn.com/files/a2b15b34-37a9-497f-8171-551d35c0ce39/how_to_start_a_freelance_writing_business_with_no_experience.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_off0000f037.bin
6ca8d80d6ded6aca5c3dfcac0410fc85951f3f4a8ff1d783fe1d3ab49e316717
pdf-font-stream PDF embedded font (sfnt) at offset 0xF037 4760 bytes
font_01_sfnt_off00010075.bin
d51378a775d8bd5ed917154a5df95195b56e65a37d666c6f97c0753d1b733615
pdf-font-stream PDF embedded font (sfnt) at offset 0x10075 12372 bytes