Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae4118d4608d3c73…

MALICIOUS

PDF

87.4 KB Created: 2021-07-05 10:12:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bb1ebbb8ad5877a1971bfce7f963b1aa SHA-1: 13e5adce41039d1222be0be9d0eb7e280357a329 SHA-256: ae4118d4608d3c7388294e114960e55400f2d3ccbe010da740e639f5ef6e7bc2
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lead users to malicious destinations, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://wastran.ru/uplcv?utm_term=muscles+of+the+lateral+lower+leg
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/ddb9f026767363093426b4caeda15a58/dunid.pdf
    • http://capmar.eu/userfiles/file/65018247681.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/bdhv338ufnpprpgdkrr8set8l0/zelakupiwokoderub.pdf
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1609bfc7ebed24---81179630922.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e011d2d7c---xuzupesazefoje.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/16083c3cc1de2e---tofubenetiwi.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a36b27d355---nomotezifoliluxutewoz.pdf
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/5ts7ur63sd1rlev7hojhoebq72/jemotifasagugopivuvuxaza.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160924125ddf48---fusisoxexewuregu.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087dd40d9f3f---72668853876.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/f39fe5228b1c98f5ed441b667be3880c/loleri.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a820e0836e7---zenitilivuri.pdf
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/c2a30a9a576a1edfc1e15dd00bd69995/34038707576.pdf
    • https://privatecambodiatour.com/userfiles/file/88140501902.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/4d48af7a70cf4cc8ae49fa192b730010/50287033298.pdf
    • http://cutskytools.com/d/files/bamesom.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/vopjf3inav35ganl3nr7idrhc5/64957768974.pdf
    • https://aawyx.com/sites/default/imageuser/file/minijimonudixozebamapewa.pdf
    • http://porpora.info/imagenes/imagenes_contenidos///xarewejabosi.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4bb4c6d81---86721948743.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a811488ea22---35808946342.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2bdc3a305aca0cf56fe5596bc57d2868/funeri.pdf
    • https://mmszke.hu/files/file/97154708422.pdf
    • 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_off0000f28f.bin
9f81427bc3b1aaa137a2311dd4bed5160807eb37b455dcd500ef099ac52d6c12		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF28F 16748 bytes
font_01_sfnt_off00011dcc.bin
a1fdb6bf34da3f4b4683b2aeefb53e524cf41a1d5e1d6e12f092ebba9a170237		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCC 10600 bytes
font_02_sfnt_off00013650.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13650 16792 bytes

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