Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0256e680f9e998b…

MALICIOUS

PDF

81.1 KB Created: 2021-04-10 06:03:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a383fc5433e496228b2a78d021cb90ad SHA-1: 549c69845d8cf1c9c68b94d860429a1bd2c10100 SHA-256: f0256e680f9e998b88ff0689b6fa233f304770286cc0603fb9b029c09c58e316
154 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL points to 'dafemum.ru', which is flagged as a malicious redirector. Although the document body contains garbled text, the presence of a malicious link suggests a phishing or redirection attempt. No scripts were extracted, but the primary attack vector appears to be directing the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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/strik?utm_term=why+does+the+monetary+policy+curve+slope+upward In PDF document text
    • http://hallop.xyz/kakotoxopijeguxirabosaxc3bb4.pdfIn PDF document text
    • https://cdn.sqhk.co/vurikede/0cidbib/72188186775.pdfIn PDF document text
    • http://matras-24.ru/olympus_camedia_c_5050_zoom_f_1.86ldou.pdfIn PDF document text
    • http://gamedv.design/assamese_new_hit_songs_freeh3w4m.pdfIn PDF document text
    • https://cdn.sqhk.co/rajunakeb/miepnIm/gantt_chart_weekly_excel_template.pdfIn PDF document text
    • https://cdn.sqhk.co/sinemajud/hihaiNE/marketing_plan_presentation_template_free_download.pdfIn PDF document text
    • http://wow50.pro/university_of_auckland_library_thesis_consent_formhf19q.pdfIn PDF document text
    • http://wow50.pro/fosepafigazga5gs.pdfIn PDF document text
    • http://gdztut.com/tiwembffzq.pdfIn PDF document text
    • http://azakalaza3.xyz/58885571561xtial.pdfIn PDF document text
    • http://power-guard.shop/mefatopamevuxojugipudopodscyh3.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/zumezeviwakiz/jozeronibino.pdfIn PDF document text
    • https://13fad4bf-7224-44b3-802b-16842e97d241.filesusr.com/ugd/b14664_8798201bb3cb4241855c7c7e3a68eed8.pdf?index=trueIn PDF document text
    • https://f33eab34-52c4-4f1b-91c9-7c5ec1255b8f.filesusr.com/ugd/9d0374_42d45e3b297f4319b060db7d1e22ccd2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/tidirozeririmilu.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/dozaxaxijuximo.pdfIn PDF document text
    • https://add83a7c-0e31-48b3-928b-061d82ba9144.filesusr.com/ugd/205ae4_aa9c593bac6c4e81bea556667f3a601d.pdf?index=trueIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_3cf7d687f932464fadce785ce7a80e8e.pdf?index=trueIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_366792ea604a45d091bb79af90921ba0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/texuwobanunilukemarosidu.pdfIn PDF document text
    • https://52b03d57-94e3-497b-b2ee-5a576b8f136c.filesusr.com/ugd/67ae49_0e16d28832bc4834a7397a91c6e08238.pdf?index=trueIn PDF document text
    • https://1cbf0fd9-62af-4102-a3dc-982f361539e7.filesusr.com/ugd/bfbc46_04548e4cf3ef4e39a00b2a5cdb2d4645.pdf?index=trueIn 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_off0000fca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA7 5580 bytes
SHA-256: 940bd15226a67f42a9835cdaff91b7b807468107fb81f0073fa3d3341fa747a6
font_01_sfnt_off00010f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F92 11624 bytes
SHA-256: 50aa9499151dfa11be77fb05f0aa56f31f5bb28647bcaa3397d9c3a6328eaa98

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