Malicious PDF — malware analysis report

Static analysis result for SHA-256 653d147a4a2fc225…

MALICIOUS

PDF

209.2 KB Created: 2021-07-01 00:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5a0736d87e34a200780e03a446f4a99a SHA-1: 0647075e7056868a6984755feefe34e592507e31 SHA-256: 653d147a4a2fc225b009d6b6af47f1ba4021f1e7799f73707611b5cd8b32abba
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate this PDF is malicious. It contains numerous links to compromised WordPress upload directories, suggesting it's part of a phishing campaign to lure victims to malicious sites. The embedded URLs likely serve as redirects to further stages of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9805

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.
  • 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 https://wastran.ru/uplcv?utm_term=inductive+approach+example
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/g816tiln7l66114vrejls4l4uj/87404159909.pdf
    • http://4grd.com/cmsimages/file/67062987666.pdf
    • https://inncredel.com/uploads/63862893396.pdf
    • https://alarouba.com/ckfinder/userfiles/files/rebog.pdf
    • http://vonkoenigsmund.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7d46cd5a4---tijomadisabososijubikone.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b6085f47d---13638619287.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ab6764213---leludikilulibabuku.pdf
    • http://chandigarhdatarecovery.com/files/file/64294053415.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2217e2ece8---ruvefilabanivu.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/4rkpvicon82kjrcb922g0ildn6/rilalek.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/939f30df3e452f3212f40db5db9dca36/53572473771.pdf
    • http://becucci.it/userfiles/files/41945137077.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f377c21a6c---61577827973.pdf
    • https://fuchscars.com/wp-content/plugins/super-forms/uploads/php/files/5151233949fa0c4e952af307d03f11c4/70174028371.pdf
    • https://ph2020.org/ckfinder/userfiles/files/99567317896.pdf
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/ldbm7cg7jtgr1ivhj1pllv7au3/61488429726.pdf
    • http://www.contectrade.hu/fckfiles/file/mimigafaropodivomama.pdf
    • http://richmediahouse.com/admin/uploads/file/84534331431.pdf
    • http://xn--szabowski-tub.pl/userfiles/file/penotekomigem.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608943e02f930---56000828916.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/2eqcpbhnjuoojm42pn9thsi0p3/jumuza.pdf
    • http://decaiyun.com/upload/file/210616152046335754xpn5acglbywa.pdf
    • http://kingalbertltd.com/uploadedfiles/file/tosobamuzarawesepodoruguf.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4937fc1c2f---wugonirofodixid.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c876d864510---82639861148.pdf
    • http://kpdb.org/userfiles/files/51482306881.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/brj245abcsv6rqf5ucbj7u8gpn/71436986393.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002d580.bin
8521886d39b667194e224cbe168bf7f6be57678760bcb4eb52c50c06b962de0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D580 18172 bytes
font_01_sfnt_off00030577.bin
daca41a2e76aaaececb1180d75f17849897b63bebfcf437441103c9ff1794c34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30577 10828 bytes
font_02_sfnt_off00031e3f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31E3F 16792 bytes

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