Malicious PDF — malware analysis report

Static analysis result for SHA-256 63732ce008a269ae…

MALICIOUS

PDF

90.2 KB Created: 2021-07-01 00:24:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 52d787077c7efb8494494dd790efb208 SHA-1: a330748d3bb216a934bc3b0172c5a9c9213c344d SHA-256: 63732ce008a269ae82bedfb8c5887542acd1310c7ed58f30c99aeca3c8bb4d7d
164 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress sites, suggesting it's designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous links to potentially compromised CMS upload directories reinforces the link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/7324c934da1e949dd6ccf9f0d0a72045/40805194880.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d52038735---8785041275.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/10rqg06n5pqhi59n1rmdsdav6u/3132821096.pdf
    • http://steakclubhn.com/campannas/file/86348435512.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a90706d64d1---34421641923.pdf
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608569dbd5bcc---67768290801.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa259151d33---zijodinevowajas.pdf
    • https://capital-tic.com/upload/ckfinder_temp/files/20210528160343.pdf
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16071710413f42---sakixox.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606d58542623d---21309981952.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b34245a5818---vezabuxanuku.pdf
    • http://guides2alpes.fr/uploads/file/24100145827.pdf
    • http://ash-graphy.com/userfiles/file/43299372734.pdf
    • http://abpaluso.com/upload/file/86049249167.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fd091209f---15951308877.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ab94741fb61---2406175160.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082792bba9cb---xujedovesuduwovesumakogib.pdf
    • http://kbchina.de/upload/28267077799.pdf
    • http://alexhofford.com/temp/files/file/solevab.pdf
    • https://stijsr.com/userfiles/file/3701893872.pdf
    • https://defaico.com/d/files/77476669543.pdf
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/j8d6bku5bovolf71tsrea2jb10/bomowamavofade.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bd1925690---5241273658.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160803e706cbc4---xerudujegokufebulot.pdf
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/tpjm9ru8ng6e8slhlnbu9ovjc4/64112361545.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=if+you+already+know+the+answers+to+your+questions
    • 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_off0000fcd3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD3 16792 bytes
font_01_sfnt_off000114e5.bin
7f4c9d682ac618e6694edba01f6559195fa8b4b602cc15d9c22e057dbb9dcd52
pdf-font-stream PDF embedded font (sfnt) at offset 0x114E5 17288 bytes
font_02_sfnt_off0001422c.bin
5b5ce774bd5594ce2d4a2134930dbb55745bae0b7b3866daeac6870f9c154afe
pdf-font-stream PDF embedded font (sfnt) at offset 0x1422C 10940 bytes