Malicious PDF — malware analysis report

Static analysis result for SHA-256 c41c01f97fe20eb9…

MALICIOUS

PDF

78.2 KB Created: 2021-03-18 05:11:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df15202f80b09e0982a38e0c855324a7 SHA-1: 23bb45cdee9b75de3892eb8c69b04370d141d2b5 SHA-256: c41c01f97fe20eb951843a7d74885b29e345f5b711653b6e0b14cf4dbc1b84ee
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to a suspicious domain, which is also listed as an IOC. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, contains text that appears to be a search query for a game, suggesting a lure to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://zajinet.ru/wix?keyword=moto+x3m+3+unblocked+games+6969
    • https://cdn-cms.f-static.net/uploads/4426407/normal_601ddfdd43cbd.pdf
    • http://vir-tus.com/19510418000r7f34.pdf
    • http://fegiroxopirez.sportsontheweb.net/42193833157.pdf
    • https://cdn-cms.f-static.net/uploads/4452851/normal_603c0c25088ac.pdf
    • http://dimusenomi.iblogger.org/ti_nspire_cx_ii_cas_calculator.pdf
    • https://static.s123-cdn-static.com/uploads/4501775/normal_600159992a964.pdf
    • http://wordwild-store.com/pablo_neruda_cien_poemas_de_amor_y_una_cancion_desesperadamiiou.pdf
    • http://idealica-columbia.site/zemikanuxaflocfm.pdf
    • http://vovavipegum.getenjoyment.net/ortopedia_y_traumatologia.pdf
    • http://topcreditreport.info/finding_the_area_and_perimeter_of_odd_shapes_independent_practice_worksheet_answer_keyyyrfy.pdf
    • https://cdn-cms.f-static.net/uploads/4382193/normal_5fe981f6ecdd5.pdf
    • http://verifedform.com/what_is_community_relations18lsf.pdf
    • https://static.s123-cdn-static.com/uploads/4405639/normal_60082599da212.pdf
    • http://sipipewawezizuf.getenjoyment.net/how_to_remove_devices_from_ue_boom.pdf
    • http://gepexoliv.medianewsonline.com/what_will_cause_a_washing_machine_not_to_spin.pdf
    • http://sujabupinoda.scienceontheweb.net/mejejuditajegerefepiweke.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1e730235-f5f9-417f-99a6-a1694cc7e229/87297177396.pdf
    • https://uploads.strikinglycdn.com/files/6102b910-4c05-4c37-8c56-747440aa8b4e/mujopapijofafunomote.pdf
    • http://tobesonev.rf.gd/642380031.pdf
    • https://uploads.strikinglycdn.com/files/ca8c9e24-ffd5-4666-ace7-c113ca45d2a7/lifetime_44_portable_basketball_hoop_assembly.pdf
    • https://uploads.strikinglycdn.com/files/8eb3ca57-9334-46ed-8431-d8632f5b5adf/47566795095.pdf
    • http://ruxatavebokoj.epizy.com/wawiwanozuf.pdf
    • http://vemenukesemi.epizy.com/73233034867.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_off0000f048.bin
efb488fb4ccc121391033cab67ace2a6acd3ddf4bbc6710984dc9aae95b79616		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF048 5912 bytes
font_01_sfnt_off00010459.bin
9165a438325c4d3df3e189d66fda5139a85ae19a18e1939e5dd6b4cd5bb3acc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10459 12068 bytes

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