Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fb4dd485ee8ed6c…

MALICIOUS

PDF

85.6 KB Created: 2021-03-21 05:37:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28d889e9c9abe44fc82116bb93001972 SHA-1: 72b5f61684ea4c89cec4cdf4186086b1ea4951de SHA-256: 9fb4dd485ee8ed6c5d46e774d55fe4edf41a2bf704afd1c3065d254e6280e4ef
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to a suspicious domain, likely intended to trick the user into downloading further malicious content. The document body, though heavily obfuscated, suggests a lure related to 'promissory note format'. No scripts were extracted, but the presence of external URIs and the overall detection suggest a phishing or malware distribution attempt.

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://nipisod.ru/award?keyword=promissory+note+format+in+english+pdf
    • https://cdn.sqhk.co/potasuregoz/AhdXhha/business_continuity_plan_template_for_transport_company.pdf
    • https://static.s123-cdn-static.com/uploads/4368972/normal_5fe4805f92593.pdf
    • http://tumuduwaju.mypressonline.com/marantec_m55_homelink.pdf
    • http://kogutojoveso.mywebcommunity.org/xixekox.pdf
    • https://cdn-cms.f-static.net/uploads/4392237/normal_6032c916103b4.pdf
    • http://fopekoriw.sportsontheweb.net/sogunibasugipivi.pdf
    • http://fuvagezilavez.mygamesonline.org/fesafefo.pdf
    • http://romeoplanet.club/remote_control_truck_racing_videosypyr6.pdf
    • http://world-wildshop.com/77463010494n9mmz.pdf
    • https://static.s123-cdn-static.com/uploads/4466364/normal_5ff8f3b34e21d.pdf
    • https://cdn.sqhk.co/lijuwezasip/gghhhDS/monkey_go_happy_6_walkthrough_all_levels_hd.pdf
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5fe99272ae53c.pdf
    • http://smirnoff-optic.com/2214812730hnw75.pdf
    • http://hotita.space/99801405076iw7io.pdf
    • https://cdn-cms.f-static.net/uploads/4390641/normal_602e72700b86e.pdf
    • https://cdn-cms.f-static.net/uploads/4463554/normal_605240c5e6a6e.pdf
    • https://cdn.sqhk.co/jukowejazus/WhgZtii/38114515133.pdf
    • https://cdn-cms.f-static.net/uploads/4381090/normal_6016bdb4158db.pdf
    • http://collegegraduatecentraldating.com/what_is_the_best_roku_model211lt.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xotopusedewix.myartsonline.com/wifojedaziru.pdf
    • http://megugasawixige.onlinewebshop.net/jowogobiv.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_off00010f27.bin
50704ef19bc1cab17c62d19f11b82c8e9ce552428b5866bafa2bd9e39ffdd00b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F27 5556 bytes
font_01_sfnt_off000121e8.bin
8b2a722c14f17a3eb87d31464f3de1c97337a7411aeb2243b3c0480bbb3e49e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x121E8 11392 bytes