Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fec07d3473480be…

MALICIOUS

PDF

75.9 KB Created: 2021-03-27 16:59:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 805247e94779964d70e8a6799966da41 SHA-1: bb82f161e59783e634e06a9a0339da6e00537cbf SHA-256: 3fec07d3473480be915920f2db9fd6523081258f0b7041df73dd67597f94b607
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'dafemum.ru'. ML classification and ClamAV also flagged the file as malicious. The embedded URL is likely used to lure the user into clicking and subsequently downloading a payload or being redirected to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://dafemum.ru/award?keyword=anonymous+inner+class+in+java+pdf In PDF document text
    • https://soliduratop.weebly.com/uploads/1/3/2/3/132303261/8e9e9c210.pdfIn PDF document text
    • https://jigaposu.weebly.com/uploads/1/3/5/3/135397088/c93868377fecce3.pdfIn PDF document text
    • http://worameruvejaka.mywebcommunity.org/baby_stories_during_pregnancy.pdfIn PDF document text
    • http://sisogelodaze.medianewsonline.com/the_count_of_monte_cristo_short_version.pdfIn PDF document text
    • http://kawasus.scienceontheweb.net/bodas_de_sangre_resea.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/vebisop/xibazepo.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/famine_affluence_and_morality_sparknotes.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/52386278028.pdfIn PDF document text
    • http://rumalitufe.rf.gd/21056577986.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/dyson_ball_vacuum_cleaner_casdon.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/34532333739.pdfIn PDF document text
    • http://tosurok.myartsonline.com/momotaro_story.pdfIn PDF document text
    • http://gixarewujedel.atwebpages.com/2002_ford_explorer_xlt_transmission_dipstick_location.pdfIn PDF document text
    • http://nijarigu.onlinewebshop.net/ielts_band_9_vocab.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/seth_godin_altmba.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/new_tamil_bhakti_song.pdfIn PDF document text
    • http://vizozaforuf.atwebpages.com/validity_and_reliability_in_assessment_methods.pdfIn PDF document text
    • http://janeresofopojaz.epizy.com/sad_song_scotty_sire.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_off0000e883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE883 5528 bytes
SHA-256: ed1ed4f2f352296d1699a57146f9b26bbdb45515f1a5aee7d51eb7a97405e332
font_01_sfnt_off0000fb55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB55 11508 bytes
SHA-256: 50a252d80183aca077eecf2d8b0713bc631afb3e8ef110956691ecfa862ed83e

Open this report in the interactive analyzer, or submit your own file for analysis.