Malicious PDF — malware analysis report

Static analysis result for SHA-256 370aa618829f0b11…

MALICIOUS

PDF

157.4 KB Created: 2021-08-25 00:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 5b5b74b025223dc3c82b4e897d437d55 SHA-1: 660a4b135201d24de8e320bcba5bd53d2652ad81 SHA-256: 370aa618829f0b11b9b65f27b4d8a1cfe0d62270b7f8babf1fb2055f5764d1f4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The document also functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains. These links likely lead to phishing pages or further malware downloads, as indicated by the high ML score and ClamAV detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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.
  • 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://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/808ffd363e7eb3d5f13ce75da1d97f23/denaxisuvawiririnug.pdf In PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/a9jv32jd2jehrdjcig08smhl06/23707034905.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160c79fbb51ffa---96448679834.pdfIn PDF document text
    • http://barcelonahotel.vn/UpLoadFile/file/vubejuw.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/49648510478.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5169c432f---22646113731.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/2481819fb7c495ca35752b8f1db0b64f/90731353471.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6c72e41353---6390640274.pdfIn PDF document text
    • https://hifi-markt.eu/kunden/kronhardt/ckfinder/userfiles/files/vibibepidafarapeges.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/f1400nhf5qmnqukv6c2s32aktb/lefivofekuviwezosiv.pdfIn PDF document text
    • https://esvigo.com/upload/files/87267856404.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a2777d84f04---zagaxejajafixefakudem.pdfIn PDF document text
    • https://birudongker.com/contents//files/15145924478.pdfIn PDF document text
    • http://nhatngungoisaoxanh.com/upload/files/47370033512.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e5bf6f2d4---jerugukekekapili.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/44300614425.pdfIn PDF document text
    • https://mkontakt.pl/dat//file/56835533224.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/48242780953.pdfIn PDF document text
    • http://grandchainfamilyfoundation.org/clients/85333/File/lupiwelugagoli.pdfIn PDF document text
    • https://activepymes.com/pub/file/kituragewamekuderow.pdfIn PDF document text
    • http://zhfangyuan.com/uploadfiles/files/xoruwudawi.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607f104d0e55b---14337422001.pdfIn PDF document text
    • http://mediasingrid.com/js/new/fckeditor/userfiles/file/nawizoditumawu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=kenneth+ross+elementary+analysis+solutionsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E766 21040 bytes
SHA-256: 99627b71f036f85c03f8e31f9e9ab56074592ce9362b83f82c7c2a80c2b87a1c
font_01_sfnt_off000220ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x220AD 10580 bytes
SHA-256: 8c48ed2153347cf55bfbcaee60ead792e0a0402f1cc8739867e0da978f84cd50
font_02_sfnt_off000238ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x238AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000250bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x250BC 16244 bytes
SHA-256: b1ef7b52ed35dfd01120c19ee4193d967dc828f2fc549fe1a2d8c3c5029b4647

Open this report in the interactive analyzer, or submit your own file for analysis.