Malicious PDF — malware analysis report

Static analysis result for SHA-256 029c6ad8db21f304…

MALICIOUS

PDF

80.0 KB Created: 2021-09-03 13:04:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 68c5d82c5320d80cb667e0692b43ae45 SHA-1: 0ea3f088fbf040477d407a996a7f3e06c5f3958e SHA-256: 029c6ad8db21f304edee77804c1fe60942049804000811b0ee75d2eeac3198a5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised websites and disposable domains, suggesting a phishing or malware distribution scheme. The PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristic specifically highlights the use of compromised WordPress upload storage for hosting malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6920

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 http://italiangreyhound.pl/img1/userfiles/file/79970339471.pdf In PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b229c388db3---visisobosupaweximut.pdfIn PDF document text
    • https://stgeorgedentalcare.in/ckfinder/userfiles/files/nokajalodopoduxidesudeb.pdfIn PDF document text
    • https://thefertilizergranulator.com/d/files/pejexojuxerevazi.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/javidanejanekan.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/78150488561.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5830254f9---xonuvoxabegofebuleneviz.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/88146941097.pdfIn PDF document text
    • http://geometracosentino.com/userfiles/files/77987667839.pdfIn PDF document text
    • http://wahluenfty.com/userfiles/sifobajerodirikisesogo.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/461abaa1e713423d9070f5f110c64f07/40097824078.pdfIn PDF document text
    • http://seritour.com/rsm/files/sefadimudamajafesibo.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607db753928fa---78192735329.pdfIn PDF document text
    • https://www.icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/kekux.pdfIn PDF document text
    • http://whs1979.net/clients/65916/File/savokalojirumegimagun.pdfIn PDF document text
    • http://studiochiodo.eu/userfiles/files/46513702402.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-7-30/20210730005408565442.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/79761464885.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b58653da8f---79938607649.pdfIn PDF document text
    • http://susasoft.com/upload/userfiles/files/nazuvadi.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ea0341e27---vozojinagezegux.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608079b006317---morulirini.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=danby+silhouette+dehumidifier+manualPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D93 19100 bytes
SHA-256: c89673a48254211b43d553689c71fc574b4b1e0d114fdac7163687e7ad1b7ab2

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