Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ad319ba0c7b3ec7…

MALICIOUS

PDF

93.2 KB Created: 2021-06-28 07:34:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4a897a4954314d61ab534f28f510584a SHA-1: f69956ce82d311323b3fa3c905c20775b91ab7d8 SHA-256: 3ad319ba0c7b3ec7d92c78a7817d863293b669fdd910dd62c6ae19de10f33c1a
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised CMS upload directories and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The primary attack vector is likely spearphishing attachment, leading to exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://fujavietnam.com/images/Download/86457961272.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160c008d2e4a85---rafekemavifepikis.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/2b0uc1qjb7k7i55k4fio42adt1/70193030274.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a60b2d5878d---waketelajurik.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/seilc1iekgjpotheie5jbqstr4/nowogebasap.pdf
    • http://horlickhigh61.com/clients/a/ab/ab3fb267cc30d45b98f460a20cee0b8d/File/guzaladetukubamom.pdf
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b77158471e---powamumak.pdf
    • http://royalwedding.jp/images/blog//file/94355401377.pdf
    • https://cafemocion.com/userfiles/file/fesipotos.pdf
    • http://a-swiss.com/upload/userfiles/file/dopowusetamuvagusobema.pdf
    • http://vyveva.eu/UserFiles/File/39352235909.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609424f54b896---96432285773.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074542a758e9---52373239168.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/5bs070t5pou7f553iussdfbcj2/lopubudime.pdf
    • http://digemnd.com/UserFiles/file/45563678531.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076083f1c6a0---wuvekakavikisovurer.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/bff5fd9e89e69ada7a060449a25c0bdd/duxodinil.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfd4ad8e78---papazetozixugakiwowix.pdf
    • http://vorne-sitzen.eu/pcms/content/file/19161649343.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d33d0902cb---51179845193.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7857773d6---polaloziw.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160812e5d10db7---fenixosomililulanive.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/baxevulafir.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/862746d129dae68faf0ae0bcbdbae039/votubifuvinumakilexilu.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16076d13e77596---88132298325.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad28077ff76---dimupinewo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=find+equation+from+x+and+y+intercepts
    • 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_off000104d7.bin
0cc8b2ae053988b78322e62ab1c53beb13120f86eb9ba85beb49497ea03d6fea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104D7 11176 bytes
font_01_sfnt_off00011eca.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECA 16792 bytes
font_02_sfnt_off000136dc.bin
6a20a82f086b76e8c8e6e6fc87660a056abfc97b26174cd8630d204b21a1df7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x136DC 18152 bytes

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