Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d649e08c4aa4a38…

MALICIOUS

PDF

97.8 KB Created: 2021-06-27 03:43:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5110a71baf76190f750ed52e66396d5d SHA-1: ed4fcc5b6af87d92adec7202d6469d335ec61e1d SHA-256: 8d649e08c4aa4a3840213047935c24dc1a3fca211b5d7766bb102f6a70c4adfc
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised CMS uploads, suggesting it's designed to lure users to malicious sites. The presence of multiple external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0fbd8f30a---gekuzopetatimavadegule.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/a0a7b75b5730b44c8f62cfdab7b95795/19380756208.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16073b56ee774c---79871278815.pdf
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/2861740265.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/ohuh1hjgqjvl3qtcnii04dc133/wevuzonifalefaworitefe.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b861625c6---zofak.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6521c9565---jagut.pdf
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/b934d40fb7f7dc5123991c856ceefc34/69232407225.pdf
    • http://www.pranabkumar.com/fckimages/file/duwibevoruz.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075eb01013e9---22679696820.pdf
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609835cb1bdfb---67309199895.pdf
    • https://dptech.vn/uploads/files/dazofokofibovepokoniwime.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a626aebf375---logalibogoxapodata.pdf
    • http://eramaztravel.com/bot/ckfinder/uf/files/pivafunimumevi.pdf
    • http://clarasonic.com/upload/file/44772776208.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a261f27979e---66548519405.pdf
    • http://multifamilyfoundation.org/clients/3/38/38c33163524538bb895552046de0b362/File/nerokukujolekosedimepuzus.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16073ec4e31444---71629596183.pdf
    • http://beergolfers.com./blog/images/file/47197529151.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff4b351ab0---gezela.pdf
    • http://nexxosrealty.com/userfiles/files/49928248035.pdf
    • http://jingluo.net/uploadfiles/files/legomurufuxebewoke.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/6cd5783a8d7c2f59d224d8ec1e14db14/konaxizavaxap.pdf
    • http://geodez.com/pliki/file/94714731534.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad1805080f---suneribu.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16095448127161---dugufonejipuzutijor.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=shrinking+tumors+with+chemotherapy
    • 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_off00011910.bin
31851f951ecc16c91b16f5e8b51b17331a8d0683fa179100fd6d0c412294ca5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11910 11244 bytes
font_01_sfnt_off0001335a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1335A 16792 bytes
font_02_sfnt_off00014b6c.bin
e6e02823fe3bae8cdb7cde40f0e56f67e1ad25154e67519521d1a8ca20d35a29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14B6C 17164 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.