Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3f07aa0ecc3f467…

MALICIOUS

PDF

67.6 KB Created: 2020-12-23 05:27:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 111b76967b7e612c2fe40f8c6ece030d SHA-1: b9c550a6097e7c8bff363d30babd637cf1406f80 SHA-256: c3f07aa0ecc3f467665a4667663fb26ab425d952ab6bd506681f3251594a7d05
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to be a lure related to a 'how to dismount out of handstand' topic, suggesting a phishing attempt to exploit user curiosity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/123?utm_term=how+to+dismount+out+of+handstand PDF link annotation
    • 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
    • https://uploads.strikinglycdn.com/files/0df32f88-2ad1-43b7-9817-6a29d19d606f/short_story_contests_2020_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/client_service_associate_morgan_stanley_salary_nyc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce033dc0-d073-45ec-bec0-a3141773e8e6/how_to_set_up_r4_card.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59dea6609fd0ee7b1a6c7/t/5fd61a3a89566e781f46c81d/1607866939011/xisudopeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3060b9c9-4c2f-459a-baec-126fdad96368/24478163120.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cb1a2f7-9aaf-4e83-b9f4-34b51ae48911/medicinal_fried_fiasco.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/vinerurikaxafagu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6cca5e2afa34b64aa8fbb/t/5fcd5f71d235d37878d7be1b/1607294846519/disonobupuvabolixuzup.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/subtracting_rational_expressions_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef995d9b-95ee-41f4-a0cf-faa80d0dc04e/hyde_park_trail_map.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_off0000c0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0B6 4836 bytes
SHA-256: 93881294247fba6f54e896c17fff4fe5e5c20547d6d9df78e7f2f3694e5c81c7
font_01_sfnt_off0000d0fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FE 10216 bytes
SHA-256: ee5fae0561c70d5d986360181d52d80f4a5a7ee0ae86b6af4d2a86317ea8f53c
font_02_sfnt_off0000f3bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BF 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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