Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5039b2116365bdc…

MALICIOUS

PDF

85.8 KB Created: 2021-07-02 15:42:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1c0a17c358f2dcd9fc7ad5c294acf919 SHA-1: d54164d26a661da3d251492db2addab52b842774 SHA-256: e5039b2116365bdcb21fb36ce75f5a046676567c02a450fa7ba06fb30b1e2944
156 Risk Score

Malware Insights

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

The PDF file contains a link farm that directs users to various websites, some of which are hosted on compromised WordPress upload storage. The ML classifier and ClamAV both flagged this PDF as malicious, indicating a high likelihood of phishing or malware distribution. The presence of numerous links, including one pointing to a compromised CMS upload, suggests an attempt to lure users to malicious content or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.buildingmalawi.com/images/uploaded/documents/45418901133.pdf In PDF document text
    • https://calendarsunrooms.com/userfiles/files/47453592452.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/gadupigivujole.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f3dc9dce3---62177425405.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///202153012360644.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb36817fd6---wuvafubokevenisusoteg.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/5829892fce636611807029543ae33cb1/bamekulatajogilinofipabu.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/7778372470.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/5d9ad0204a917ccd0fe58b4c1879688a/52476860726.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/uma5p4f9c3it0l1030kga44b8c/wofijodarajogud.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/2245c53476d2609915e1ca1f38f84cda/54301896711.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/38017656931.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/b2ce237fd2721d1f35f876922f502176/zopitibigevoxipewad.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///2021616523409.pdfIn PDF document text
    • http://mistralizmiryonetim.com/uploads/file/87478142112.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/2aa1925939ac798bef8e04dc464c7ec0/sofuzawavubabatumageguv.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/buparexoxasolijijesuzejet.pdfIn PDF document text
    • http://psychoterapia-przemysl.net/img/userfiles/file/37945980342.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa70dad349---juvamuvinot.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/35f3589a75d47ab106fb319921d2cd85/kaxawal.pdfIn PDF document text
    • http://healthywithhart.com/res/file/tevuxi.pdfIn PDF document text
    • https://beatmuellerfoto.ch/userfiles/files/86295952383.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/6kqqiu6hrgeiv5ucfl68br4t2b/luxagirogumuzizob.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/44518224006.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=watch+justice+league+zack+snyder+online+freePDF 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_off0000ebb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C6 16900 bytes
SHA-256: 73a279383b09e987f1317745f9dc3f0982a57377b8999993fbf24af94c8f1a9e
font_02_sfnt_off00012f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F89 11244 bytes
SHA-256: e0277150076b9d11e847138c8626cdd47ec9f0d4dc2f8eaf63d1b0328f13a884