Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac4e6c2e93862109…

MALICIOUS

PDF

76.5 KB Created: 2021-03-31 05:51:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9982ab034c8909275560697285fb0936 SHA-1: 5186e6bd4cff80d7101861161a672b77a9161ff3 SHA-256: ac4e6c2e938621095ea9557f2c1805eda5d98c2990d48590de94087d5673f2ce
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a phishing site. The document body, though heavily obfuscated, suggests a search result lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/award?keyword=auditor+interno+definicion+pdf
    • https://cdn.sqhk.co/tajiwikiter/NdpjiEA/baby_alive_baby_grows_up_happy_doll.pdf
    • https://cdn.sqhk.co/rapenikidu/gfju0hg/bollywood_top_100_songs_2018_download.pdf
    • https://cdn.sqhk.co/vimitewimuwi/ZLhfx5X/51861810035.pdf
    • http://xuratalusat.22web.org/pictographs_worksheets_for_grade_1.pdf
    • https://cdn.sqhk.co/kakapoxavu/Nhjidjb/flight_simulator_war_plane_3d_for_android.pdf
    • https://cdn.sqhk.co/wenegifuteg/jcMjjhd/avid_pro_tools_2019._5.pdf
    • https://kuximakid.weebly.com/uploads/1/3/0/7/130739256/61662a2.pdf
    • https://kuwumezebuxe.weebly.com/uploads/1/3/4/1/134131528/e9d4b14b8830ca9.pdf
    • https://notojusuwetu.weebly.com/uploads/1/3/1/8/131871856/5d085673f5.pdf
    • https://cdn.sqhk.co/masunidupag/pFNjijh/my_dream_home_design_game.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lusegokaves/american_slang_expressions_and_their_meanings.pdf
    • https://s3.amazonaws.com/loxopudizus/24717665540.pdf
    • http://tosememab.rf.gd/asepsia_antisepsia_desinfeccion_y_esterilizacion.pdf
    • http://nasedelowose.rf.gd/jedufew.pdf
    • https://s3.amazonaws.com/zuniverijesud/39537696438.pdf
    • https://uploads.strikinglycdn.com/files/8a37ef5a-fb1c-4678-8293-cc987be9f2c0/what_god_says_i_am_list.pdf
    • https://uploads.strikinglycdn.com/files/809d1bdd-c220-4e35-9ed1-5aa636defe5a/an_inspector_calls_historical_context_bbc_bitesize.pdf
    • https://uploads.strikinglycdn.com/files/1e1225dc-47c4-44b1-b01c-ec7f3be6815b/65883017796.pdf
    • https://s3.amazonaws.com/gateme/35906307494.pdf
    • https://uploads.strikinglycdn.com/files/0f326afb-3511-4e02-9707-4575ccf55997/what_happens_if_you_dont_renew_your_medical_card_for_cdl.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_off0000ee04.bin
bbff2c5452161c46cd548c5829ee32f3fd107a9a44d05e2439754f4fb3ca2753
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE04 4716 bytes
font_01_sfnt_off0000fe27.bin
e968facff51d437e51f8d7b661b3d02fe30f18e2cfdc26f015635af93a68cdf2
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE27 11564 bytes