Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d2658f8bfce4dd…

MALICIOUS

PDF

92.2 KB Created: 2021-07-22 08:21:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3f020ae18e7c1ab557649e1b345c2799 SHA-1: ca35a51b42602025319dfec0e9e3d895d2e956cb SHA-256: 07d2658f8bfce4dd10b111ba0bd95ade61c957a132d429cc7710ea4c6a14dfd2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for exploiting PDF vulnerabilities or initiating malicious actions. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites used for hosting PDF files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dca2144b50c---31507036944.pdf
    • https://kaplaitalia.it/userfiles/files/45917322211.pdf
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/e2b16110485b376eda73f43666d33346/72589925181.pdf
    • https://n-zvuk.ru/upload/file/sivixufineteneba.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a563bcffc---pabufopasad.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740bb61f002---39979338104.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607f60fb45736---xuzamirajajitufapiza.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160d687bc09ca6---watese.pdf
    • https://samyenngochoang.com/wp-content/plugins/super-forms/uploads/php/files/iv29uvppkvtstksafu8fm3i73h/3010389154.pdf
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160b32be04e52c---riruweregumosup.pdf
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fikupusoxiwosivig.pdf
    • http://jeremypourstarlight.com/clients/5/53/539822683240d2210db56c0084569a8b/File/68240381327.pdf
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/449cb1ba3630536b80945d525a6459f1/tebimu.pdf
    • https://uniontend.com/userfiles/files/vulunitakipavomigupufe.pdf
    • https://sfasg.jp/js/ckfinder/userfiles/files/74947623782.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/jb43iukcueerua9n7plrbjvt56/39102040096.pdf
    • https://www.haievent.com/wp-content/plugins/super-forms/uploads/php/files/omlei9rdq03n9o4tdsv6fs0tqu/254491930.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/vaxer.pdf
    • http://offerseir.com/basefile/offerseircom/files/48730750224.pdf
    • https://planet-pvc.com/upload/files/xopebagikivivok.pdf
    • http://sieuthivatlieuhoanthien.com/upload/files/turobol.pdf
    • http://15thstpresbyterian.org/clients/d/d7/d7025cfb1d4df99eee5a588ecc3dd57f/File/64365707353.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/1e01a30e4569e85bdf4c147a34ccf63d/2799966620.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/3f93e8b55a60a22c6df658b295bd5f9c/73332916017.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/588a358afadccb5eb6d5ce044ab55b33/51414645712.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/3a9d825b837e00cb6570442c9f484599/97654079847.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=formula+of+coulomb+force
    • 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_off000105e8.bin
be41037cfce750b8fe2fc7a194c2b1c7a908ad20f7317c35adfc5535e30062f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x105E8 10252 bytes
font_01_sfnt_off00011cf2.bin
93ab48ad25fd558aea8a36fe5bc7d42aad30f736ba3be95c5f15c08618b52d90
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF2 17544 bytes
font_02_sfnt_off00014b46.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14B46 16792 bytes