Malicious PDF — malware analysis report

Static analysis result for SHA-256 e996a04b2a2c459f…

MALICIOUS

PDF

134.7 KB Created: 2021-08-26 12:38:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d49330a4ccd514ddec8c43316db7d48a SHA-1: d52e490ceb2aa6d069e4799144e7d1a61dff1cf6 SHA-256: e996a04b2a2c459f9f4995118d0a84cca55d11b06efea054834eb37e679921c3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the overall structure indicate an attempt to deliver a malicious payload or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9842

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://garglob.ru/uplcv?utm_term=alice+in+chains+nirvana PDF link annotation
    • http://jucal.es/images/file/45335783001.pdfIn PDF document text
    • https://alsultantrading.ae/userfiles/files/lululizakikumiw.pdfIn PDF document text
    • http://jgweld18.com/UploadFile/file/20210826015821091.pdfIn PDF document text
    • http://ramz-alqassim.com/Files/files/demunuwupunerodegekoloxe.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160956087732dc---wogukirevawelebat.pdfIn PDF document text
    • http://sunrui-ti.com/d/files/wagemebexenuzudi.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/43b1f229d5cdb25cd089aa8b6569e336/felokurasewa.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/7005bkcfs8c88nc97jbccoe3mb/befezidekomanokelaxuj.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/uunea6tl1lke8jc9mrrutu966m/19966285773.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/bilolumaz.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/6287273039.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103c706671fc---naxaxexidu.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/49574686584.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/cf8cb3dc86e258b484b2eba88bfbd4d4/97632740956.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/vibisif.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160770c724d542---goxaratuwefibuviv.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3d8681017---wiloguvix.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e3a32b7c1---98572433365.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kasekovoge.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/walaxig.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c87e6b7c405---gawozegisokizezigofusa.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/48884501167.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/0bfde8d37c9be8cae95b37712dfe055a/gofajojinazofogosemija.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/ace5780adb119c37ae815c44ae6ad15c/bajezujaxepis.pdfIn PDF document text
    • http://acupunctuuryao.nl/ckfinder/userfiles/files/65274109458.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a79bee5f8a---83926902622.pdfIn PDF document text
    • 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_off0001a67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A67A 21144 bytes
SHA-256: 5269c14f644e567ce4b9b46310de60a457203f9b1b5298449da56538ee0b22e7
font_01_sfnt_off0001dbd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DBD6 10156 bytes
SHA-256: 3362670542cfb821993218c29c24019a9d2b7fc0ef097dcb3d4e73c3e668dd06
font_02_sfnt_off0001f277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F277 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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