Malicious PDF — malware analysis report

Static analysis result for SHA-256 29374d9ffbbb3d0b…

MALICIOUS

PDF

69.9 KB Created: 2021-01-25 12:15:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ae6f6f5a664b114ed7b445f0bbdbaadd SHA-1: 3d7a42e5c78ae96db661d1c63cc0923bbb4cefe9 SHA-256: 29374d9ffbbb3d0bb3dd64061dfc69c3d862b425b5ef7ed358ed32265b9b260e
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, 'https://yafferge.ru/123?utm_term=caminante+no+hay+camino+cancion', which is a strong indicator of malicious intent. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0'. The document body, though heavily obfuscated, appears to contain metadata related to the 'wkhtmltopdf' tool and a song title, suggesting a lure to disguise the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/123?utm_term=caminante+no+hay+camino+cancion In PDF document text
    • https://cdn.sqhk.co/vagizabibo/fI2gjgf/nfl_standings_2018_week_6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387709/normal_5fd200ddafb96.pdfIn PDF document text
    • http://nimened.66ghz.com/tsunami_in_japan_2016_information.pdfIn PDF document text
    • https://cdn.sqhk.co/zanotunuzi/12jeCij/neruduboj.pdfIn PDF document text
    • https://cdn.sqhk.co/wodabakope/URrjhWg/octopus_plural_greek.pdfIn PDF document text
    • http://tuguxanofa.iblogger.org/vurogawusup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385230/normal_5fdfd3ae158e5.pdfIn PDF document text
    • http://gekalam.22web.org/17809279792.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374185/normal_5fc918168c814.pdfIn PDF document text
    • https://cdn.sqhk.co/razulati/hdjdAij/sunset_restaurant_diner_brooklyn.pdfIn PDF document text
    • https://cdn.sqhk.co/pavujakorige/dtzjHhg/36660518576.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/fojaxexino/unit_conversion_worksheet_8th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/kuxenilijeg.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/what_s_my_name_descendants_2_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/nofivined.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/anglais_franais_traduction.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/platform_heel_shoes_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/17856180342.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/80964488468.pdfIn PDF document text
    • http://xuxuxal.epizy.com/80373484145.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/fawelet.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/collecting_ant_specimens_reading_answer_key.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_off0000d4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A3 4740 bytes
SHA-256: 16c3b1b8bac882660c834e262048cb341729d1c3fa422577952026443926052d
font_01_sfnt_off0000e4a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A5 10964 bytes
SHA-256: 15a9c29041dd7deef2d639cc2f43123b800db6be1a49840f707a93f5b15a8ede

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