Malicious PDF — malware analysis report

Static analysis result for SHA-256 030026c9b3fec4fc…

MALICIOUS

PDF

97.5 KB Created: 2021-07-05 22:14:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 639112f7bf9ddb3b974dec47f749ca5f SHA-1: 469988549dc63bd633bcb05bc571c3a30286b743 SHA-256: 030026c9b3fec4fca336b5575015d717cfc1e8644b4561044e1cb9262164276f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF acts as a link farm, pointing to multiple compromised WordPress upload directories. These links likely serve as a distribution point for further malicious content or phishing pages. No scripts were extracted, but the PDF structure itself is used to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16084f4147acb6---58108290929.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0034b8a16e---kunixolaniromapat.pdf
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e49dc00de---rowusodi.pdf
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/d38d98229ee60b2234403fc78364bcb4/dobuvosejoxinekesarajepag.pdf
    • http://kursadowicz.pl/Upload/file/93866954669.pdf
    • https://empirepin.com/calisma2/files/uploads/58232494755.pdf
    • http://stolizstekla.ru/userfiles/file/49417638290.pdf
    • http://aj-logistics.com/stock/userfiles/file/fibajakuv.pdf
    • http://retco.ge/ckfinder/userfiles/files/lopaxinovunopilerosesojof.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/b55c240d2be3bec00483888ff50531a6/vopofafow.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/8bd28e04aa6ad8247a3ea8af7d37f885/57934618791.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7329c25c7---152188678.pdf
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b98e01e06f2---72548947138.pdf
    • http://avision-italia.com/userfiles/files/depirelezer.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099c13bc5f6c---zewor.pdf
    • https://nadamasristorante.it/file/29702588866.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d1d65fc98---72307872198.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/078dafec294a7dfaa9d257074c6a7db3/39631218293.pdf
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/86b9fda75eefa6eda87377ad14a91c2d/pixomekukoxasufejuxixube.pdf
    • https://alarrabnews.com/images/content/content/file/zunifuxopumiluxoriki.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b8de29a93c6---weselusoruwem.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/bcba06825f419a3a35e266f47f066cb5/naluli.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da506e7190b---sajovanuxanokevowom.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b27627e12---xilekarudamukufavuj.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/5aabe40ecb2daaa49f4db134eafd4ef5/25774137163.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bc54767d119---kawisagat.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=self+introduction+in+interview+in+english
    • 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_off00011782.bin
7a76fc42cfc1381fe694d13edfbe68de38ad8ec4e6bdc45a0e134a6f6958fedb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11782 10920 bytes
font_01_sfnt_off0001308c.bin
915e408244a4330564ad80bc9b224eb84b6e55751bf141a903067ca5bfbde02a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1308C 17624 bytes
font_02_sfnt_off00015e6f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15E6F 16792 bytes

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