Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff4872eaf277d03…

MALICIOUS

PDF

80.0 KB Created: 2021-05-21 16:47:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6b658a2da72dba9e6a5b7c665dec1322 SHA-1: 21384fdc786d036eadd9aae6b69dc95e98f1dc68 SHA-256: 9ff4872eaf277d0305cec4a163a857c0022239cb9977171474bb0d590b5c1d23
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. The presence of a 'download button' heuristic and an external URI pointing to a suspicious domain suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to movie downloads, likely serving as a lure.

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://zajinet.ru/strik?utm_term=comali+tamil+full+movie+hd+free+download+in+tamilrockers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4473926/normal_60053df37fd01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5fda8e4e54540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379222/normal_5fe7e5b93390d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412388/normal_5fc7b94917684.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377642/normal_5fdb9b4ab94e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498702/normal_602779c80ae00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454430/normal_605963fe053e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412377/normal_604cd6376f616.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_6035c7d670f3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382192/normal_5fe9965a56182.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482872/normal_602bfaf6ac59c.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/lezerawe/sports_streaming_app_android_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c77ff8-5f4f-4dd9-9a74-7196c9931303/what_are_six_major_biomes_found_on_earth.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/backup_android_messages_to_google_drive.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/taurus_pt111_g2c_shoulder_holster.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/sowedebuxeweragel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a9af27a-dc8c-448c-bacf-caa939b99ecc/phonetic_alphabet_translator_german.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/healthy_food_guide_diabetic_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/game_wala_game_karo.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_off0000fba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA0 5380 bytes
SHA-256: 2609647f519d65dcc25d5d58d1fde4ba068d8640cdf300da60e5cb39729b060d
font_01_sfnt_off00010dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD8 10732 bytes
SHA-256: c19042391f11a829ca5a76949ff87cb7ce29a316435d0d327374eb88ef7c9569

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