Malicious PDF — malware analysis report

Static analysis result for SHA-256 b070f5f600ef4a28…

MALICIOUS

PDF

58.0 KB Created: 2021-02-27 04:20:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: e75c46592b68a2d9f463ebf3957ef891 SHA-1: 973ee9d700d8d37e6cbe1529240f1fd43457feed SHA-256: b070f5f600ef4a2812b675bf98ec7aae34593ad658ef1fceee7603e30605986a
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and a heuristic firing indicates it's a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to search terms, reinforcing the lure. The ClamAV detection and ML classifier further confirm its malicious nature, likely serving as a dropper for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9856

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
  • 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://fokemale.ru/strik?utm_term=baby+girl+names+with+kai+in+them PDF link annotation
    • http://tamakar.tech/64394176826vo7sv.pdfIn PDF document text
    • http://clobuss.ru/prayer_wheel_dnd6si4m.pdfIn PDF document text
    • http://lynciguest.com/maze_runner_the_scorch_trials_full_movie_download_in_hindi_300mb6dfqj.pdfIn PDF document text
    • http://netewe8.xyz/kakibafebagpo4ux.pdfIn PDF document text
    • http://sfhgfje5df.xyz/nobelelbnz9.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/jhcjefc/super_discount_liquors_elizabeth_nj_07202.pdfIn PDF document text
    • http://itdiscounts.pro/assimilation_policy2xpeg.pdfIn PDF document text
    • https://cdn.sqhk.co/gojapawareke/8hiiCge/wivuge.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwuxa/idhddjj/fivestars_topup_recharge_promo.pdfIn PDF document text
    • https://cdn.sqhk.co/nobegasosev/cahadhh/tienda_movistar_el_salvador_celulares_postpago.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/lekezaru/dobivasija.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/51360788831.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/51829495709.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/vim_insert_mode_cheat_sheet.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7CA 5544 bytes
SHA-256: cc8223489a865f7275b167a98d87a6040e416fb45057af967ae7e6dcf9171f90

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