Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d4ad25bdaec034…

MALICIOUS

PDF

85.7 KB Created: 2021-03-30 15:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d6cb7fb289e8d06ca1d305fbee80a39 SHA-1: 7627b50c95493490518048e014a4bf6ff3a8abbf SHA-256: c5d4ad25bdaec0340bc7b611cea421b4e145a1e0ce2d15905149e75fe65d0043
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, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to educational content, specifically a 'physical science answer key'. No scripts were extracted, but the presence of embedded URLs and the overall detection profile strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://maypoin.ru/wix?keyword=233+physical+science+answer+key
    • http://visanekis.iblogger.org/awakening_the_giant_within_by_anthony_robbins.pdf
    • http://bcpzonasegura10beta-viabcp.com/josukewenz9lp3.pdf
    • https://cdn.sqhk.co/kugefiruxat/Hjc8igd/anz_coin_counting_machine_near_me.pdf
    • https://cdn.sqhk.co/liwewajawab/YThchjd/arjun_reddy_cheri_cheri_lady_video.pdf
    • http://joxepubevi.22web.org/71209177842.pdf
    • http://garant-ritual.online/42022604332gm5ya.pdf
    • https://cdn.sqhk.co/ninilevikod/igeVgfO/wajomedij.pdf
    • http://mastericy-chistoty.ru/nufidetudoliqhr.pdf
    • http://venira.su/agreement_on_government_procurement4pp4q.pdf
    • https://cdn.sqhk.co/gaxomawelej/hgljrjf/my_town_iceme_amusement_park.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wizasagi.rf.gd/sa_ambulance_membership_application_form.pdf
    • https://s3.amazonaws.com/vudivuzakal/accounts_receivable_net_of_allowance_balance_sheet.pdf
    • https://s3.amazonaws.com/nijudow/66931175527.pdf
    • http://tutivute.epizy.com/academic_calendar_2018-_19_template.pdf
    • http://puwixatokido.epizy.com/how_to_use_ryobi_1700_psi_pressure_washer.pdf
    • https://uploads.strikinglycdn.com/files/4853bcc5-e037-40e1-bdbd-fb9c4a49c058/how_to_set_up_roku_model_2710x.pdf
    • https://s3.amazonaws.com/xonaxevetaf/86916995779.pdf
    • http://gewapapis.epizy.com/child_support_direct_deposit_form_fl.pdf
    • https://uploads.strikinglycdn.com/files/532ea2f1-059e-4106-8202-1b49c7061632/40769218216.pdf
    • http://jefevuxivux.epizy.com/bhojpuri_gana_2019_ke_ing_mp4.pdf
    • http://paxajuleki.rf.gd/convertir_de_a_word_gratis_trackid_sp_006.pdf
    • https://uploads.strikinglycdn.com/files/638689ce-9f7f-44f9-bfe2-23d036352ed6/what_is_the_purpose_of_anode_rod_in_water_heater.pdf
    • https://s3.amazonaws.com/tikoweravisixu/17714226254.pdf
    • https://s3.amazonaws.com/nitajosasa/guzomuzufasuzisi.pdf
    • http://tiliken.rf.gd/rifasir.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f908.bin
190c09271658ac57c5c7b05fc741c2349a43ca66c5396f6fac081c1ed5aebbcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF908 5480 bytes
font_01_sfnt_off00010bbc.bin
74af138d844c122d3cddc2541c803cd1576486bdd43715ffa7588774b879a62a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBC 12228 bytes
font_02_sfnt_off000133fa.bin
10572f3a10760712fbb8352e098d229fd21f48763f52fb6fd9385479015ceb58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133FA 16060 bytes

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