Malicious PDF — malware analysis report

Static analysis result for SHA-256 e41751dc8b183630…

MALICIOUS

PDF

69.1 KB Created: 2020-12-04 11:34:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b38e1252ac3587c04cc9a15994b955ca SHA-1: 39c8ba281dd6b42e6f8ff875df735c74515950c0 SHA-256: e41751dc8b183630c2c11ff8eda426b636d74740856f0e613c789008c8e545a7
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'trafffe.ru', which is likely used to host a malicious payload or redirect to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'freak the mighty worksheets activities', indicating a social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/123?utm_term=freak+the+mighty+worksheets+activities PDF link annotation
    • https://tijisevivojo.weebly.com/uploads/1/3/4/5/134502531/fibilomazulejo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393028/normal_5fc6047a6a35f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413465/normal_5fa8918cb0f83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369638/normal_5f9ff717c6723.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc153656609fd0ee79445da/t/5fc790fe3d56556d14419a3e/1606914303836/valiram_247_discount_code.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cc948139af037644bbed/t/5fc0e6d27acac6192ae21868/1606477526426/dead_zed_1_full_screen.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11cd924b06a7eb3006de8/t/5fc6d50309f4d56e8f72e5bd/1606866179912/69281470118.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/68236271312.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f8872cf09257bd6c6ae2/t/5fc4afe2e6d49a06bb26ecc5/1606725603471/the_essential_life_book_6th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/account_statement_sbi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc370a42cf09257bd7c0e07/t/5fc6d1144f9413233b0e2457/1606865173562/good_songs_for_ringtones_2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf59d49ee0f32b874afdc5/1606375900888/temogekolu.pdfIn PDF document text
    • http://www.readwritethink.org/classroom-resources/lesson-plans/reading-writing-workshop-freak-41.htmIn 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_off0000d108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD108 5452 bytes
SHA-256: b9cd88d9471e23385295180fe70015daa41bdfb3b05ad4b1baa69df6d1cbb9ff
font_01_sfnt_off0000e391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE391 10868 bytes
SHA-256: 76490067f384e0c5558616db7527490f99fa5fa19e70973b0fdaca8258826214

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