Malicious PDF — malware analysis report

Static analysis result for SHA-256 087e01aabdc94e47…

MALICIOUS

PDF

90.4 KB Created: 2021-07-12 17:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 32b77062af83bae52491cbee49a7ebb0 SHA-1: c813743e46a7dc8cdcbe1f6fb9e2e0b724ffb763 SHA-256: 087e01aabdc94e47c3cf8094e2d72a8b4a010f04362968ae55038c66b6802547
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. ClamAV detection and ML classification confirm its malicious nature, likely as a phishing or trojan delivery mechanism. The file's structure and URL patterns are consistent with a phishing lure, potentially delivered via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080155c7223a---42562269743.pdf In PDF document text
    • http://tuttotop.com/userfiles/files/20043440535.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/mogib.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0cf7e4529a---pizixajoluteduzefejivusis.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/9b3a2272fdcc9e94b49697407b0dcc7e/34817806930.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/dipedame.pdfIn PDF document text
    • http://perfekttorun.pl/pliki/kamirijab.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607217c61970b---14094673373.pdfIn PDF document text
    • http://aweibel.com/Photo/file/jezixaji.pdfIn PDF document text
    • http://bio86.fr/fichiers/551505958.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/9c99fb343c8f433d673f3c80d6c8128e/tupotexipiji.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160afd78c70d8e---7283421849.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/c72a5f79e54a24b86ddc4a2312ff393c/53981476711.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609fdf129db4b---13665349271.pdfIn PDF document text
    • https://simplehome.ro/ckfinder/userfiles/files/34233636498.pdfIn PDF document text
    • http://forspeed.cz/ckfinder/userfiles/files/90780026280.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608998f3b7b68---10162109791.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/qm2fkmkbcc2ahngfvsqm07boek/92808717521.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/b7c3f205c4a1903ceaecada27bc60f8e/83471368390.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160d77679dfb99---puvikirowovepewadeji.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/sukobodosibelamomep.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160807e5eb622f---genopebufutipiguwapegem.pdfIn PDF document text
    • http://maihome.hu/admin1/file/24671338969.pdfIn PDF document text
    • https://pk-kuepfer.ch/ckfinder/userfiles/files/vosodapik.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd646e4614d---fifemi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=html+profile+template+freePDF link annotation
    • 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_off00010117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10117 16904 bytes
SHA-256: 0c7299207bea8cc5a3ff1876fd0ca43699a5a7d2bc51e32851abd71e9c16fe5e
font_01_sfnt_off00012d38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D38 10236 bytes
SHA-256: 9dbb5855073d85f0ad84f8202c40629b2fd36b50f5421e10a63ca704c135f800
font_02_sfnt_off00014421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14421 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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