Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c12662a22dad387…

MALICIOUS

PDF

66.8 KB Created: 2021-02-25 03:00:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 66f573e2ed91e5900d6925a4c0ed4e91 SHA-1: 451d208f75934eaa92d8fdc90612bc755df7c113 SHA-256: 9c12662a22dad38789e997822bc367eb6d77861ed326f9639445a7671df5dfc6
184 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or redirection scheme. The primary URL, 'https://maypoin.ru/award?keyword=how+to+write+your+accomplishments+for+performance+review+examples', suggests a lure to disguise malicious activity. ClamAV and ML classifiers also flagged this PDF as malicious, likely due to its structure and embedded URLs designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8603

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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://maypoin.ru/award?keyword=how+to+write+your+accomplishments+for+performance+review+examples PDF link annotation
    • https://cdn.sqhk.co/kagaxavog/jgrgihf/regekarovakutiwojupo.pdfIn PDF document text
    • https://lanokonemuke.weebly.com/uploads/1/3/5/3/135309959/3aea27fefcf37c.pdfIn PDF document text
    • https://cdn.sqhk.co/sowojusawepu/Dihifys/61587328516.pdfIn PDF document text
    • https://cdn.sqhk.co/zegareguw/qiehccW/jitatikesukegetef.pdfIn PDF document text
    • http://punavuvipufov.sportsontheweb.net/why_is_printer_saying_driver_unavailable.pdfIn PDF document text
    • https://cdn.sqhk.co/ketejeti/cjigceO/pixel_art_kpop_color_by_number_mod_apk.pdfIn PDF document text
    • https://xedububedopo.weebly.com/uploads/1/3/0/7/130740082/a9925b0ad34.pdfIn PDF document text
    • https://firalikagux.weebly.com/uploads/1/3/2/7/132740609/d5a362b51fafd1.pdfIn PDF document text
    • https://lelorovosa.weebly.com/uploads/1/3/1/0/131071021/tupowabep.pdfIn PDF document text
    • https://cdn.sqhk.co/bovokolel/dihdBhc/28780160436.pdfIn PDF document text
    • https://guretaximijogu.weebly.com/uploads/1/3/0/7/130739376/930bcc.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/naxozelozude/school_attendance_sheet_format.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/bahishti_zewar_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/bunker_hill_security_system_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/florida_ese_teacher_certification_study_guide.pdfIn PDF document text
    • http://nununad.myartsonline.com/sentinel_gun_safe_serial_number_location.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/tascam_488_mkii_manual.pdfIn PDF document text
    • http://futikuzita.onlinewebshop.net/super_mario_land_2_dx_rom_online_game.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/80431291725.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE477 5536 bytes
SHA-256: a10a6749a2f168176acfb5c6a694db6ee62c8dcf7051f043d5db4add0ad72235

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