Malicious PDF — malware analysis report

Static analysis result for SHA-256 d281b8b0c0c3af1f…

MALICIOUS

PDF

54.0 KB Created: 2021-09-03 13:47:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0db82d04daf540daa4678970afb6ec31 SHA-1: fffc92b1f07103d34484f26e34f3a4687f22670c SHA-256: d281b8b0c0c3af1fc25bf3066440f71066a736ac8e03fc60eef52c2baf5a25da
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a phishing trojan by ClamAV. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution campaign. The PDF structure and embedded links are indicative of a spearphishing attachment, likely intended to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4912

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
  • 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://huntic.ru/uplcv?utm_term=impact+factor+journals+list+pdf PDF link annotation
    • http://ues-rb.ru/themes/ues-rb.ru/files/gukekekatolifabe.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/nanagawizogovep.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608aca51b867a---15766928209.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/wisizavutego.pdfIn PDF document text
    • http://totaldeliverancecathedralchurch.com/clients/2/22/22dae496a1749ae881e6bee195142b05/File/83815236396.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbb36d83d1---40860421412.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec52a74f26---15411124169.pdfIn PDF document text
    • http://firanywiktoria.pl/uploads/editor/file/3895526988.pdfIn PDF document text
    • http://ordinate-ltd.com/file_media/file_image/file/talisoxinonozumi.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac470ec5c40---nomodesulupematirigovodev.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a636d51f0a6---sozovevo.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/49825344919.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16090e102f1fe3---famiguguvijefow.pdfIn PDF document text
    • http://oroblupiscine.it/userfiles/files/fital.pdfIn PDF document text
    • https://carlojans.com/cms/file/17491648187.pdfIn PDF document text
    • http://daikinhbac.com/upload/files/dedisixakiped.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/l73c8d5tsdgt80nsg1niuo0gs5/3511520210.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/letedozabomasavotur.pdfIn PDF document text
    • https://100tmt.com/uploadimage/files/20210831080433.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/lubajobele.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/5ou8527opuahuuiq0hp480dk56/34780400531.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160fb8e15c058b---9081213672.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/bajubadilibogewiwafakono.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/83846237174.pdfIn PDF document text

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