Malicious PDF — malware analysis report

Static analysis result for SHA-256 543ba912fdd84a38…

MALICIOUS

PDF

67.8 KB Created: 2021-09-06 03:16:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 590491ebd28db253ba22f9a212a11889 SHA-1: 3f7420aed34c327f70170255375bc6953baa638e SHA-256: 543ba912fdd84a38eb0d1fb80c941f7559e8a7c255999209a1a4797e27ea3b75
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple links to external websites, many of which are hosted on compromised WordPress installations or disposable domains. The primary link, http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/4tqp3rjeofkmdfs6rfv4av3151/telopavik.pdf, is algorithmically generated and points to a suspicious PDF. This suggests a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5872

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/f5734d2e885b349dbe53ef7a22b41e50/95281373503.pdf In PDF document text
    • https://abeess.com/userfiles/file/vufasa.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/viximetelagutijefara.pdfIn PDF document text
    • http://seamacros.com/upload/file/zaxaxigirejilifemizatige.pdfIn PDF document text
    • http://perfekt-dom.pl/designhome/admin/userfiles/file/87558462157.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160801777060f8---nigebuduwami.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/f76fdb410c0750ffc3e96cb00c7e5900/28936218250.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b56e4eb9f3e---wewoludati.pdfIn PDF document text
    • http://klimatyzacjaradom.pl/userfiles/file/23963260630.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba44ed56224---85828594103.pdfIn PDF document text
    • http://erex.hu/upload/file/sukosusizirufi.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name//files/93629157541.pdfIn PDF document text
    • http://petersonspann.com/clients/3/32/32c4b2f41fa698b5b938e848169c8dcb/File/kifetodagurixumumetuk.pdfIn PDF document text
    • http://omnoiptv.com/outscapes/admin/ckeditor/uploads/ck/files/52769816535.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/1a6i2efghosutfpo6r31r0i984/mifelevovasu.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee8902d93d1---35221031860.pdfIn PDF document text
    • https://fallsplat.se/bildbank/file/dovuritakig.pdfIn PDF document text
    • http://xn--2-140-swe8h.xn--p1ai/files/kixodemuposenagibodezuxi.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/ac1f9d846f630bee2f585bb8efe6d0a4/boleluwijebizivow.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b322e9b1c---sexalixonoto.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/dab96d8a485755b97e3f4c5f1876251d/wolukapupelikopa.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/99548632069.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/4tqp3rjeofkmdfs6rfv4av3151/telopavik.pdfIn PDF document text
    • https://air-separation-supplier.com/d/files/runonogiza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=cara+update+manual+windows+10+1809PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2C6 11320 bytes
SHA-256: 7c64a87647242e7aa5d5b4a85e1847bbd7d9f36d2e7ce5f89d55fabfaa0635ff
font_01_sfnt_off0000dd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6D 16728 bytes
SHA-256: 19ecba34ef2ef07c5a50c5d46cf2688dd524468f287a44a638baf832e59a4ba6

Open this report in the interactive analyzer, or submit your own file for analysis.