Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a70695a562bf78a…

MALICIOUS

PDF

198.5 KB Created: 2021-07-03 16:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 0ca6b2ea23de9e4b30020ad4e4490b31 SHA-1: 5761067876fa713b953d7a84b4e822d5fca5ee95 SHA-256: 3a70695a562bf78a294129f2805d45f469f615395e43f31614e35d7c8280df50
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan. Heuristics indicate it uses a link farm and SEO redirector, pointing to compromised WordPress upload storage, likely to lure victims into downloading further malicious content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8931

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/53caacd06d97142f285e2143c322b876/logugetozibevi.pdf In PDF document text
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/0def31814d4bbbbc6070e589efa93ac8/kitepuzudezekatepegokew.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e8b381865---fopigegawepigobogu.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/2e9f7cea753b07003d800dd204760fb7/88437491186.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/98af1c3623932b88cbd1a8f7ec7dce86/65891574056.pdfIn PDF document text
    • http://sanmarinreunion.com/clients/c/c0/c0747301521b2fcd71a0106c9132c7e7/File/mozufawoviz.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/sqileb5uarnubit1307r7fo1q4/luruzavexiput.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a4c828961---2991111788.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/0a5kqfgfrkb35n3vmtnr7suoco/89891483847.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/71035066961.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/35112244900.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/51784155243.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160757cabe27af---34717714228.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/tebetirujitamovasuforulov.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b88cffd6633---tasibinulizagobareg.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/85588979445.pdfIn PDF document text
    • https://medprobr.com.br/wp-content/plugins/super-forms/uploads/php/files/fc9f357b41af5f25b04745547854152b/9784653417.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/84605567145.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16073be764bb04---32598707404.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094785ab82a4---87517452144.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f18e5add9---34612544689.pdfIn PDF document text
    • http://imailbox.nl/images/uploadedimages/file/xolowijojipotekutotot.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/f268975f9039b2f472ece014d0987b25/veluguvuwujum.pdfIn PDF document text
    • http://xiaohecollege.com/d/files/89915160445.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/61545484140.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=first+hacker+of+free+firePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00028ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28EE6 10352 bytes
SHA-256: 1515fed2fa4f2c08d8951af710586f86bf6ee418ad48eea4568ebb5317ff21f6
font_01_sfnt_off0002a66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A66C 6572 bytes
SHA-256: 406c0c9d6a3ca91e757a629d683a20a793b207ade2f1d09393cee91908c21612
font_02_sfnt_off0002bdef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BDEF 20744 bytes
SHA-256: 6717e625891ab071c35a4d7921d952952ccdbd48223b450bb4fc21e3ad7802bd
font_03_sfnt_off0002f385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F385 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1