Malicious PDF — malware analysis report

Static analysis result for SHA-256 6994ea698c75b769…

MALICIOUS

PDF

74.2 KB Created: 2020-12-24 19:44:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: e0f1035b8e2f429c0995ab465f6c719e SHA-1: ebde183e145f25f10b046cf00e04e9b023054d30 SHA-256: 6994ea698c75b7692c4c2e4fc445c6db3c8cb14e28149db1a684b997c0ad9171
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of a download button lure and an external URI pointing to a suspicious domain further supports a phishing attack pattern. The document body, though heavily obfuscated, contains references that align with the detected threat.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafficel.ru/aws?utm_term=deezer+cache+files+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380701/normal_5fb27e24ed40b.pdfIn PDF document text
    • https://cdn.sqhk.co/dowufagit/bhijfFR/einstein_s_riddle_logic_puzzles.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/generic_bluetooth_driver_windows_10_free.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/dc_dmv_driving_test_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/gizonimetuwujeka.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/karmasandhan_bengali_paper_today.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/google_chrome_for_windows_10_64_bit_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/80105591727.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/8_gallon_air_compressor_tank.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/a_formal_letter_to_editor.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/22829715253.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e52d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52D 5156 bytes
SHA-256: 50cb085e4fb2bae5c96ba39c198526d48d0e25e1c74b20257db16fa36809724d
font_01_sfnt_off0000f6bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BD 11036 bytes
SHA-256: 1e6caeb3b03a8877d08e5870d4370fb521de64ef20d8d64743d1a1e42a81db94

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