Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8b4edf2cf9d1efd…

MALICIOUS

PDF

101.3 KB Created: 2021-02-17 03:54:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d4d05563c7186efbb4baa58e1755461f SHA-1: ed4f4130c74b165d356e7382003bcf93f28c570f SHA-256: f8b4edf2cf9d1efda53a0163798043979d44ffece66cca5281665d32b5d138e9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used to distribute malware or conduct phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to 'skam italia season 1 episode 12', suggesting a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/wix?keyword=skam+italia+season+1+episode+12 PDF link annotation
    • http://bofesota.66ghz.com/android_file_transfer_mac_bluetooth.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/jbvjije/kimimoviti.pdfIn PDF document text
    • https://cdn.sqhk.co/xedaberetaj/ZjhTFie/funny_pictures_of_animals_dancing.pdfIn PDF document text
    • http://xuvalikamug.22web.org/ajith_billa_audio_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/lokijuzim/hc7TwU3/65033394698.pdfIn PDF document text
    • https://cdn.sqhk.co/nobutowug/3jdFjaC/fusowokutagipitakimu.pdfIn PDF document text
    • https://cdn.sqhk.co/jizuxadif/igiuxgd/75733208925.pdfIn PDF document text
    • https://cdn.sqhk.co/dagufiwus/aheRijE/vanaxaboxil.pdfIn PDF document text
    • https://cdn.sqhk.co/xanodujijefu/gdibxii/xinoliw.pdfIn PDF document text
    • http://wowonofejubudib.iblogger.org/roku_2_xs_remote_control.pdfIn PDF document text
    • https://cdn.sqhk.co/waximanodif/hjylih5/crossword_heaven_clue_help.pdfIn PDF document text
    • https://cdn.sqhk.co/lokiwejawe/cjgnlac/ratujenidase.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nadefivetokilak.rf.gd/whatsapp_gb_transparente_atualizado.pdfIn PDF document text
    • http://rakejobik.epizy.com/employment_letter_format_for_us_visa.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/66557808447.pdfIn PDF document text
    • http://poduzamilikuki.rf.gd/nathaniel_bassey_imela_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/game_android_street_fighter_apk_data.pdfIn PDF document text
    • http://butukiri.epizy.com/cadbury_dairy_milk_ad_full_song.pdfIn PDF document text
    • http://dirujuwut.epizy.com/tipasolewuvirim.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_off00015292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15292 5360 bytes
SHA-256: 38cdb29303b74ae61abc49bc331c4be0ab72c63a58384322a787c6ecec6ca805
font_01_sfnt_off000164ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164CA 10260 bytes
SHA-256: 5b60db1816971148bb6f8d909bc076fef0647483208fdf3e1d27f550f5379455

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