Malicious PDF — malware analysis report

Static analysis result for SHA-256 32e4b02cc7672afd…

MALICIOUS

PDF

103.5 KB Created: 2021-07-02 00:32:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5e6dce9de933d0c19f2b15cc1bc30e30 SHA-1: f87d908ffe4edf81e312cd3bdbecce687d7d69c4 SHA-256: 32e4b02cc7672afd5cb5cb2a64e370a6265bee6a127aa9e94673e9c71ad77c96
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to compromised WordPress upload directories and other disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

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://baxsporthorses.com/userfiles/file/13171687666.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5438a0f55---46999899101.pdf
    • https://clumba-indoor.ru/files/files/96892066322.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16097271980090---70012919257.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160bf857a6e984---kaselefobaxagumi.pdf
    • https://nsck-cykelmotion.dk/userfiles/file/63107037320.pdf
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/65b182a9f81f54c319cca313073492be/lasuvitetidomen.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160715d1b6f6f8---vepis.pdf
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3916e87dd8---54670988072.pdf
    • http://keralabiblesociety.com/fck_uploads/file/30215437117.pdf
    • http://olgapolyakova.com/files/files/97876424627.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083c069411c3---jovesuk.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160af1c425a431---16713995429.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8107dd522---93595888303.pdf
    • http://bodegaadrover.com/userfiles//imagenes/47257068131.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/da59314f0b3cef07deea3261a470b10c/gotasukegunuvikivelogab.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770aa4e0a34---bekiguwijoju.pdf
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/406au69ajoe8okvai9v0altfh3/zenasomowe.pdf
    • http://abwgulfport.com/uploads/files/43809770044.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb9b454c70---84734310466.pdf
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/f9fed076e1c42f0242f937ac33528042/bapukog.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=cyclops+fragments+map
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0eb3eb71af---xejamuxarulev.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b86.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B86 16792 bytes
font_01_sfnt_off0001339d.bin
229724d6b9ba92227c78733dcb9cb2279d794f1c121db08af74c6b7a4140fb77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1339D 10876 bytes
font_02_sfnt_off00014cd3.bin
74ea40c6abafff908ba0a862ebf25ee1d47d31f530ca964bdc695191fb21b084		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14CD3 16116 bytes
font_03_sfnt_off00016227.bin
a66c511a3e96aab6ef477275e0f469240331c7c368a486b098ccd4d0e1b8efc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16227 17676 bytes

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