Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fdd5d45bebce041…

MALICIOUS

PDF

78.0 KB Created: 2021-03-03 07:11:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 83a2cc6a52e45ee7adaa53dcb3c75a6c SHA-1: 639a16438c816cef92062ef37e3bc1c343f143f9 SHA-256: 1fdd5d45bebce0418fb0d96b2e7811e6cd7801a3cedb1785a1b17cc24949ab17
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The document body, though heavily obfuscated, contains text related to resetting a Motorola phone, suggesting a lure to trick users into clicking the embedded malicious URL. The embedded URL, https://druttle.ru/123?utm_term=how+to+reset+the+motorola+phone, is the primary indicator of malicious intent, likely leading to a further stage of infection.

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://druttle.ru/123?utm_term=how+to+reset+the+motorola+phone PDF link annotation
    • http://larts.digital/723480900353e6mj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387582/normal_5fdb94c2c9fdb.pdfIn PDF document text
    • https://cdn.sqhk.co/bikugipozamu/jijfPgh/according_to_the_clash_of_civilizations_thesis.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/fchag8M/rikapafe.pdfIn PDF document text
    • https://cdn.sqhk.co/xitilesuxiw/1ejcbif/41531058733.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/hR0vLxe/zunodek.pdfIn PDF document text
    • http://lozosomegav.iblogger.org/problem_solving_process_steps.pdfIn PDF document text
    • https://cdn.sqhk.co/sepokafaru/gigdXis/bike_mayhem_mountain_racing_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/jisepozidis/Fjvx2hj/34504094706.pdfIn PDF document text
    • https://cdn.sqhk.co/vafegijateno/gcrniia/calendar_template_word_editable.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/hdMjiFJ/free_thanksgiving_wallpaper_for_desktop_background.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489839/normal_602eb61954260.pdfIn PDF document text
    • https://cdn.sqhk.co/xegunorasu/hcwgj0k/xutuvazab.pdfIn PDF document text
    • https://cdn.sqhk.co/vupapevixu/jMijgnD/31977943467.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/ijlEihQ/dufoxa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://toradodotuvate.epizy.com/annexure_e1_hssc.pdfIn PDF document text
    • http://zovitox.epizy.com/broadsheet_vs_tabloid_language.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_off0000f5e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E8 5112 bytes
SHA-256: eb341c4db5d2fc3e529a4d78e483496318fca065cda2f3fd33a49ea93a71ae77
font_01_sfnt_off0001072c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072C 10392 bytes
SHA-256: 49fb4986c3a2aa31d66ab0afbe354b32f6520e558ce871cfeb7abb786d986205

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