Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d25ed1a5d5f142a…

MALICIOUS

PDF

49.4 KB Created: 2021-09-18 02:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: d5f2acd417ac0f490005a290dd2363bf SHA-1: 2475a25c08995491c6856e42c71dc9d98c62bd34 SHA-256: 1d25ed1a5d5f142abd4669d46a443e7886b8ac32a2ac4dfb0aa82c50a34c6aad
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to compromised CMS upload storage or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8419

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
  • 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://crewmak.ru/uplcv?utm_term=facebook+faster+for+android+free+download PDF link annotation
    • https://ferropula.hr/files/78554009660.pdfIn PDF document text
    • http://dailygameresult.com/editor/UserFiles2/files/57458786568.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/17153109010.pdfIn PDF document text
    • http://bwlpsalisbury.com/uploads/files/3582426033.pdfIn PDF document text
    • http://e-kva.ru/admin/ckfinder/userfiles/files/54833280860.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/c2nrhr0qurdhb01osv2fhuefoo/lagotiwuwekudirevitezit.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/0be40a41f6291aeac3d791227481fdc1/22858791077.pdfIn PDF document text
    • http://thaihotelsale.com/FileData/ckfinder/files/20210907_E5781972B66F1D8E.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/f1cf08cacf628808a0e793028be9ffcb/vofofuxiwa.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/30519527819.pdfIn PDF document text
    • http://luckysim.com/userfiles/file/kazedusaxoxokaro.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16139f08b7570b---14372961632.pdfIn PDF document text
    • http://stylekd.ru/files/26324827293.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1614519dfc3235---funik.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/80307270587.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16142a1a778ccf---26552596801.pdfIn PDF document text
    • http://top1np.com/ckfinder/userfiles/files/rumaxebutimuw.pdfIn PDF document text
    • https://valenciamaids.com/userfiles/files/jakuki.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/f302ab38402e12f47de7376b925c5da4/lixamefewulimi.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/6cf317c9cfdf4111452c9d81ef11980a/74301361223.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/d762c1ecb58ea3f78eff31192ebeac2a/tubexub.pdfIn PDF document text
    • https://ms01bet.com/contents/files/59978054123.pdfIn PDF document text

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