Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f72d7845f950e27…

MALICIOUS

PDF

82.7 KB Created: 2021-08-02 00:54:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f5872d47863745675304b36b0fdaccb8 SHA-1: 81d91c20d514fd1931d47bc7077ca5a5d6116a21 SHA-256: 7f72d7845f950e2763015e3de10c64eeb0f2f48b1572b5c4f17d7814bdb8d676
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, designed to host further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to trick users into downloading a secondary payload. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9183

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 http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805e448a0ab---xunusijosumowusedaxipotup.pdf In PDF document text
    • http://hondasushi.com/uploads/files/wukagukituredexazod.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609223f841d4b---38946438487.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/86561244938.pdfIn PDF document text
    • http://sushiyaslo.com/uploads/files/26648771747.pdfIn PDF document text
    • http://songiadahoaian.com/upload/ck/files/puvamepipaxaximonup.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160df80cb78eac---fefobuganopopewaxugegur.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/50808124189.pdfIn PDF document text
    • https://thedestinbeachhouses.com/wp-content/plugins/super-forms/uploads/php/files/28a9251540dbb1ec708a90a0c719aa29/95809513641.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/63059733944.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021062021000218.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843f6575d9b---4165663636.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609854ddc6771---92293288284.pdfIn PDF document text
    • http://blankheich.de/images/uploads/file/12608886794.pdfIn PDF document text
    • http://cintabogor.com/Uploads/userfiles/files/fepaxi.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/8cd71bd61380c900ef2224ca4d31e774/fusixapixapuxivek.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/20488050258.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/b0aa316488540d58560aaaccb15c199c/libipuzosubunop.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/29274081565.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/nuzofekokewutoje.pdfIn PDF document text
    • http://artistalexanderkanevskywinnerinternationalaward.com/clientMedia/file/sexixugiroxixenememo.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/68125743558.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/3iu5gbibpeakhgmucv3ae02ssk/24751785514.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/b935b149bdd78d3ddbe37969bd625e32/zarurunetikuvarudeze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=kirchhoff%27s+voltage+law+circuit+problems+and+solutions+pdfPDF link annotation

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