Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c47d0f149e33f45…

MALICIOUS

PDF

92.9 KB Created: 2021-07-06 01:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8e924d09ee3df1d63a8648b41ac32a73 SHA-1: fedfbf5fb234483c39dd3bdaedf1079bd878e517 SHA-256: 2c47d0f149e33f45823b23c9d10709f720e6b08f105651d4ecc78942912fd9b6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress upload directories, indicating a link farm designed to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4fe3c11af---74468546055.pdf
    • http://ks-puyuma.com/CKEdit/upload/files/zotojejovaveboreru.pdf
    • http://henri-ruch.ch/doc_pub/file/tiwilakegerodavunemomu.pdf
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/ca0eb85019647a4233b72ebe55cef41f/katusisoguga.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/3pd3n9o81qr2ok76r2h0go8r1e/60314863925.pdf
    • http://andlupa.com/userfiles/file/10627452419.pdf
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/08eacabd093bfcbf15061882677349dd/81327337622.pdf
    • http://komputerzagrosze.pl/userfiles/file/64197366923.pdf
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/rf5re97u4d0o9ja52u2js9a172/98480860850.pdf
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/dfdefv6o39v4bqmtssd9hppbg0/72211030866.pdf
    • http://greece-ex.com/images/blog//file/17724556587.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a09d03c7b---jorizumotifunujunuji.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/dd6895a6a79e087bfad34d4a407edd7f/90286413270.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7eed569fa---84035088346.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f33d4d7b69587273b457ab606432fdcb/55121232551.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16099af34c1874---xavizegepanisupukalodi.pdf
    • http://alpha-cp.com/userfiles/file/10292331748.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16092505af08ab---favoridixagatizanudibi.pdf
    • http://cuhs1981.com/clients/8/82/82ca37c076ec4232796cb58ed009bb3a/File/lekoboserojajogatebugu.pdf
    • https://jungleflightchiangmai.com/Uploads/files/17371829923.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16098fa8f9a605---1217448837.pdf
    • https://nanyangtextile.com/userfiles/file/xuzajiwurumopokoke.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdeb05908c---12935424170.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/80utbh0kvc07v8fp5md4f40dt3/gunipini.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=why+do+i+love+him+so+much+it+hurts
    • 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_off00010737.bin
605fef4638f69209202f75dd2840be7a67d7607c8a17170e2285747f9ba74cf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10737 10640 bytes
font_01_sfnt_off00011f94.bin
33e26d1532aa06f233f103e150b256155a064efc241ccd0b397f6d0e05cafc55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F94 17248 bytes
font_02_sfnt_off00014c97.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C97 16792 bytes

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