Malicious PDF — malware analysis report

Static analysis result for SHA-256 7201978e5eca2b7e…

MALICIOUS

PDF

77.9 KB Created: 2021-09-04 13:50:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: da4938a5f6db6b8f6a0c8efe4a8817aa SHA-1: b0779a3de079857d913cc3da9b7c3f7adcfb3ddd SHA-256: 7201978e5eca2b7ea0ba030b4f8f6374a415a3d5eb9462343cf19b8e7e2198b9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to lure users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://gabortech.comadmin/file/42745913467.pdf In PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160b25f661604d---74960699475.pdfIn PDF document text
    • https://zaragozadenoche.es/upload/files/sapalasi.pdfIn PDF document text
    • http://steinemann-ag.ru/xebagojujuv.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba74bc6966---pejuzotun.pdfIn PDF document text
    • http://isystem.hu/ckfinder/userfiles/files/sigibitopesobozorurab.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/42807c2dc41c04647fc9c122bb4e449f/malegivugutafigasarugazi.pdfIn PDF document text
    • http://koddous.com/userfiles/file/81088890910.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc6d616117---muworezofefox.pdfIn PDF document text
    • https://esz.jp/img/editor/files/jararozivu.pdfIn PDF document text
    • http://wsm.hk/images/files/29409272451.pdfIn PDF document text
    • https://muzpony.de/obrazki/file/83745689845.pdfIn PDF document text
    • http://keramann.ru/uploads/files/30055701230.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/f6f87dd79aa22afa2b93acbfeb8a26d0/46413191079.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/92e3b24b896d58a7ad6c17d8715c3322/pizimugupiliguwakab.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/foralovev.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/fagtf2opll9fn30lgsbf2vr76l/96727257377.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/cc30088e06037e74f5d464ef7f5648e6/dijetivuraditexasodibabuz.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/3vlm5gvajf4ug1c85guuhdh4e3/82629398582.pdfIn PDF document text
    • http://vekosgroup.ru/userfiles/file/sukibuderalokutumopotoves.pdfIn PDF document text
    • http://demkapi.com/resimler/files/33942038389.pdfIn PDF document text
    • https://efnnma.org/files/file/susigidowezafuko.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/38d8bcd8dbd90ac2f5357477d02a9b6b/85298049631.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=como+citar+un+archivo+pdf+sin+autor+en+apaPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC566 20032 bytes
SHA-256: af2ac3fdd432d633640ab7e56467977ee0cd9072e0e5f38c0cb903f11720b0af
font_01_sfnt_off0000f85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11071 11036 bytes
SHA-256: a4f5d871cff572a5ebc679b8cee359e21f911c1ab4d86e1674806a99b56bec30

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