Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d70ce1691ba827a…

MALICIOUS

PDF

69.2 KB Created: 2020-12-02 01:23:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0f38fdd6ff44e4bd1aabe8067c4b7c4f SHA-1: 301f3069cf1a5d926c1fa62c22cacdf6a9fd5c3d SHA-256: 3d70ce1691ba827a575874a15dcf1ed4a17b73b19bd51fd89bf387d729db1fdb
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, trafffe.ru, which is likely intended to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to 'Vitamins worksheet for students'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=vitamins+worksheet+for+students 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://s3.amazonaws.com/sixenogafopoj/cengage_mindtap_spanish_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1a859ab79f442f22ef377/t/5fc66724eaf37e3b64778b16/1606838053473/live_stream_nba_finals_2020_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d08f942-2e0c-4a52-8240-16feb13ae731/sunday_school_lessons_for_8-10_year.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64c582e537a05ef2dcca0/t/5fc6b60aa038a451bcd40d32/1606858251260/flick_basketball_ghosts.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f79e2e34347c7044618a/t/5fc4e64d3c02f22b9da67b5e/1606739533133/modern_essentials_usage_guide_8th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac397b87-8ba1-4e77-a5c0-d4e77d4a17cc/56155670144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cfc3e53-b08c-4bfb-ab3e-69bfd17a35c1/73690125750.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/sonomarowesuzoroj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27b6fdf132613bbc7a91a/t/5fc4708bcb3e0f5771de0fdc/1606709387749/37132589970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36475f1c-4429-4a71-99b1-c8b0e7f30acd/75261653277.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa984cbb-dd0f-433a-a323-8b56e36729db/zosatizuzobisovedimutil.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d3b00b6b03258f353712/t/5fc2c35b173fb5383bfe8909/1606599516111/cold_day_in_the_sun_lyrics_foo_fighters.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_off0000c4c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C2 5120 bytes
SHA-256: 4eb2a00ea113cfc717549ed6e203c40f0a811543e63976af8c3fa23fbf0250f2
font_01_sfnt_off0000d60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60D 10572 bytes
SHA-256: 7ce4b140ffc2b1975b28acaf5a5fbf618cc8fed07be4df57350a7d99f107552c
font_02_sfnt_off0000fa2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2E 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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