Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0494733585fd499…

MALICIOUS

PDF

93.7 KB Created: 2021-06-26 21:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 25983a056c86becddcb19858b4338e2e SHA-1: b7b1a770344b34a7e0a5b24897a3f775603aceb9 SHA-256: d0494733585fd4992c7f21d9e67052b7a1e0c6f4c9355db6a77f6693c4ffbc63
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and disposable hosting, likely intended to redirect users to malicious sites. No scripts were extracted, but the structure and URL patterns suggest an attempt to lure users into clicking through to a malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://butchercurnow.com/img/shop//contents/61021928290.pdf In PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db102e23f9---tesogaradogomekalifinipi.pdfIn PDF document text
    • http://quiltingacademy.com/fckeditor/userfiles/file/fujetemipomikagive.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/cqfhr4iv03amttuaf3l8qdpub1/divezi.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160bf7cea7d804---36043078395.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/hrpq47p1jd64eubr5k6sfn04vo/56624715393.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160861b7064ca0---20563071333.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/78ecdc49d83d956b0c6fc571879fc574/62087392468.pdfIn PDF document text
    • https://alutat.com/data/file/61828747252.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070304c8ae25---kikav.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/5a3deb744838f4beb48ee3db3fa1df82/bividuvexorotegevufegirex.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608789c8a181d---kesokuwazasavugegila.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160bc57dc6863a---54332642309.pdfIn PDF document text
    • http://cga82.com/admin/File/74174754405.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/dd7599c89a371fbc5283ef8e3ffaafa8/84038699366.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/kininijifovexulavi.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c0ced7923---jazutedeb.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160cfe95f67b36---25388234529.pdfIn PDF document text
    • https://porterbrothersltd.com/app/webroot/uploads/pomafakenizagawuzutufori.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/kumolemokexibopos.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aff3b525cab---71743150985.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1761669e6---nizetubowivomufemuvotiru.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2163be41c---dupitetaxaxa.pdfIn PDF document text
    • http://abaj.cz/UserFiles/File/binubinetiro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=meaning+for+tediousPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD314 6832 bytes
SHA-256: 7b7dc74bcfe605814a86cd7bd56929c7f339b98039d5f21e5cac00c45430343d
font_01_sfnt_off0000e9e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000101f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F9 21264 bytes
SHA-256: 018b38a67631c9e7e629bc1913890dea805f1a4fc746b793fdadc93c65ccf1d6
font_03_sfnt_off00013843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13843 10576 bytes
SHA-256: 4a6700f1b48262d737b0039744122dcfd00f1509b099a891540daf2531f27d44
font_04_sfnt_off0001504f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1504F 16536 bytes
SHA-256: fa7f6ad7a070ca07059778f56bd26f01c4c35f5777735b1a945fd84ac56b3217

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