Malicious PDF — malware analysis report

Static analysis result for SHA-256 38ae6acb9c9fc6d9…

MALICIOUS

PDF

125.6 KB Created: 2021-07-25 07:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 9477c6bd00311291879ead78bfc6b6cc SHA-1: 2ec6ca34241d80e2c9d3694ba66e305c7f659fb6 SHA-256: 38ae6acb9c9fc6d92a165fffc61b41b0bf2df48e57b94c99b492fe635c8616d3
204 Risk Score

Malware Insights

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

The sample is a PDF containing embedded JavaScript, which is a common technique for exploiting vulnerabilities or delivering malicious content. The heuristic 'SE_SECURITY_BYPASS' indicates the document explicitly instructs the user to disable security software, a strong indicator of malicious intent. ClamAV detection further confirms its malicious nature, identifying it as 'Pdf.Phishing.Trojan'. The presence of numerous external links, many pointing to compromised WordPress sites, suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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 https://www.alitec.es/js/ckfinder/userfiles/files/kerigulizevosulal.pdf In PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/a06bad67a9a004fd02258cd62a28263a/nediboxamapafe.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160b73e5de73ec---85091316878.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d880f8d29f---komebozofafexujuk.pdfIn PDF document text
    • http://polimak.pl/userfiles/file/44368397213.pdfIn PDF document text
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/93375084785.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/cd1fd98c6089f3f45e60b2d135351527/domewaganazitujafotirigo.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/20136970918.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608683398c6cc---davuze.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/litavanizomakom.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/xanasigokubo.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/rizibagakemakeroxukotuvug.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/qq54h06iefji2tavd1h41vh6b4/77749004724.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a2771ac18---34072584934.pdfIn PDF document text
    • http://15thstpresbyterian.org/clients/d/d7/d7025cfb1d4df99eee5a588ecc3dd57f/File/mamipamabef.pdfIn PDF document text
    • http://bigdoughpizza.com/uploads/files/zitevuxi.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd03a98db2---foguzosizipazarokaf.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a777cfbb037---kuboduwewimegepufikuxewe.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/65546cf00a5b27403235e62bd2c679a1/42378185152.pdfIn PDF document text
    • http://balone.net/_upload/file///50284414405.pdfIn PDF document text
    • http://20thhelicoptersquadronreunion.com/clients/71358/File/33582871815.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/jofen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=kindle+paperwhite+2+file+formatsPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/fd6f03ccab273f801cef4dd8723e6d5b/1130681893.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18786 17888 bytes
SHA-256: 6d95c223852f0b8cb680c9261b11f9678d8c6034cd49766b1750ff0018a7ab94
font_01_sfnt_off0001b6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B6DE 10960 bytes
SHA-256: 7a19ad8b0898399ca3bf958b390a55e8e6b97412582fa8642e902b7b810c1ee3
font_02_sfnt_off0001d02b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D02B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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