Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4602e1789cdf2b1…

MALICIOUS

PDF

78.8 KB Created: 2021-03-10 14:55:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 23bc32b5e8fcd5af13fd5c6873bc9219 SHA-1: b8cb4fee827276896b2d1a17d9066cf64765af05 SHA-256: e4602e1789cdf2b1c4e96c71207a9c84b3e08ed6fa83f66f86d265e8a6b17632
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/123?utm_term=adobe+flash+player+cs3+free++filehippo PDF link annotation
    • http://remastacer.com/wovojagebinoxawotklkyd.pdfIn PDF document text
    • http://asia.kiwi/grid-_template-_rows_repeat_10_1fryg33o.pdfIn PDF document text
    • http://motivawka.online/80395716972px5po.pdfIn PDF document text
    • http://natikolom.site/phpspreadsheet_array_to_sheet41gs7.pdfIn PDF document text
    • http://b4shop.icu/transportation_a_supply_chain_perspective30xik.pdfIn PDF document text
    • https://cdn.sqhk.co/bepemuno/1fsibKm/59801165228.pdfIn PDF document text
    • https://cdn.sqhk.co/zabitokepum/jhfjdxR/11093198014.pdfIn PDF document text
    • http://vukipika.iblogger.org/53873216364.pdfIn PDF document text
    • http://rafale.store/jazz_christmas_piano_sheet_musicbzrxh.pdfIn PDF document text
    • http://repochka.site/how_to_charge_jbl_go_2r3k96.pdfIn PDF document text
    • https://cdn.sqhk.co/xorunase/TlAqggs/download_ultimate_wolf_simulator_2_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wogokodu/gfldf3S/sumezokedinimelekeba.pdfIn PDF document text
    • http://busivel.xyz/gutibelisaxaxotsi5p.pdfIn PDF document text
    • http://useporte.xyz/how_to_build_a_house_foundation52jwh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wojodine.rf.gd/60620834121.pdfIn PDF document text
    • http://pigibotokaper.epizy.com/submit_button_in_contact_form_7.pdfIn PDF document text
    • http://jukigegamoma.epizy.com/legodewawatalidoviniz.pdfIn PDF document text
    • http://xadaguxo.rf.gd/81346856418.pdfIn PDF document text
    • http://novabimakokoj.rf.gd/aprilaire_5000_spec_sheet.pdfIn PDF document text
    • http://vezuzatutuxi.epizy.com/bunny_film_video_songs.pdfIn PDF document text
    • http://suxosimuji.epizy.com/nawiteroluvoxumefa.pdfIn PDF document text
    • http://mujevevurisul.epizy.com/formal_dress_rental_near_me.pdfIn PDF document text
    • http://wixudilasajigil.rf.gd/kowitikizelemozafajik.pdfIn PDF document text
    • http://luwunepozu.epizy.com/filajesabulavuvinefakir.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_off0000f551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF551 5640 bytes
SHA-256: 6fa0ac1a0742b3a1faa3ab0cd68114343b185946fe0afec28594bb78b15db43b
font_01_sfnt_off00010885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10885 10760 bytes
SHA-256: 2335aec6ec4df9f7d6cd3c60ca60732ad7ed6f305d2f504bc57ca878b689de05

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