Malicious PDF — malware analysis report

Static analysis result for SHA-256 f75c1c8f4c880eec…

MALICIOUS

PDF

73.8 KB Created: 2021-04-04 10:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 85cd43fa9d80c106d9dbcb193669814b SHA-1: e0bf0eef1cb014af2a3b0916fca059d78c2cf90e SHA-256: f75c1c8f4c880eec0ca3d4df9838eab3d3cd14bcbe4adf4b8b33f36ff94296fc
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 high likelihood of malicious intent. The embedded URL points to a domain that is likely serving malicious content, disguised as exam papers. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xezojetit.ru/strik?utm_term=ibps+clerk+exam+previous+question+papers+with+answers+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412599/normal_60157dab82207.pdfIn PDF document text
    • https://cdn.sqhk.co/sowodopevew/hgAjgje/note_10_launcher_pro_apk_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419642/normal_5fca328a8f9a5.pdfIn PDF document text
    • https://cdn.sqhk.co/kidurukazag/UUicYHC/world_war_3_countdown.pdfIn PDF document text
    • https://cdn.sqhk.co/damukowabij/gjHigiA/6445408703.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495257/normal_60078daba2327.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499636/normal_6056220c4bc66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378836/normal_60080a57a75f4.pdfIn PDF document text
    • https://cdn.sqhk.co/vedanoderifu/d5gevNp/best_wallpaper_hd_frogs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tatefubuzu.rf.gd/64516616404.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/kipowilu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06ae2ceb-94d7-460e-82e0-7ab5e3a14d27/gomorekowoxikonuvime.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/ramonoz.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/4373337913.pdfIn PDF document text
    • http://rojelolazekozox.rf.gd/trauma_de_abdomen_en_nios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2d7e16a-aec3-415c-b869-98df2a4b26f2/62103065969.pdfIn PDF document text
    • http://nepowatalol.epizy.com/w3schools_core_java_tutorial_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f96e8535-759d-4fec-97f7-f63d937d249e/lg_heat_pump_error_code_ch_07.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/fugibar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76ef3b24-051d-4b9c-be64-b3388559a839/maven_debug_configuration_eclipse.pdfIn PDF document text
    • http://kugilib.rf.gd/selebukalisuzop.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/25645404945.pdfIn PDF document text
    • http://midelex.epizy.com/craftsman_electric_leaf_blower_gutter_attachment.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD587 5764 bytes
SHA-256: b37e836547ad2d24f225a03152d5510b062564a32c14e7b80bb8edede3aeb6bd
font_01_sfnt_off0000e8fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FA 10024 bytes
SHA-256: a559eb09afaa77adea71939c98c55a4c1dffbdbf36a79e67899da4b1daf6195f
font_02_sfnt_off00010b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B26 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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