Malicious PDF — malware analysis report

Static analysis result for SHA-256 edba395d33c5a7a8…

MALICIOUS

PDF

74.7 KB Created: 2021-09-26 09:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 5a079b78220aed3787ca160626c3eb37 SHA-1: fcb968a6e7f116a1377a155b4fd9fae5a84d56ab SHA-256: edba395d33c5a7a8294d10403b0ec6fa888ffa27a7a750339fe67749519460fc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating numerous links on different hosts, suggesting an attempt to manipulate search engine results or distribute malicious content. The embedded JavaScript likely facilitates the redirection to these malicious sites, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://infrive.ru/uplcv?utm_term=malayalam+ebooks+free+reading PDF link annotation
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/02cced9e43421ce4d47a50e4391d8674/nefenetuvufuxixalaker.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/welovifor.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/wokevoxesomerefuve.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c2b5d0ee39---2562906735.pdfIn PDF document text
    • http://ksiclubbiz.ksiclub.org/svnprojects/DHD/Source/images/files/savopawivofinokixanige.pdfIn PDF document text
    • http://dasbluemchen.com/lezar.pdfIn PDF document text
    • http://www.artefuoricentro.it/js/lib/ckfinder/userfiles/files/jalawexonamujumi.pdfIn PDF document text
    • http://supragyn.cz/userfiles/file/wodoforutuxivalumolekisu.pdfIn PDF document text
    • http://resheto.ru/users_images/fck/file/jowiz.pdfIn PDF document text
    • http://nj-rshb.com/v15/Upload/file/2021921020225438.pdfIn PDF document text
    • http://belly.bpv.su/content/files/files/bopevimerimojiv.pdfIn PDF document text
    • https://parvazyab.com/basefile/api203/files/jinukupula.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/1cqcchdh4nc3a30n9bnneuqibh/binazokizomokokur.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/suwutusexujelaruwiwiwa.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/19ee74b9fc1865bcf8f8cb4ebc3ce950/kutopafavesukuvenawupeg.pdfIn PDF document text
    • http://pmrs.ps/userfiles/file/84245212325.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/60676427724.pdfIn PDF document text
    • http://neogmbh.de/www/sites/default/files/userfiles/file/8686089215.pdfIn PDF document text
    • https://allcondosales.rodeodrivecondosale.com/userfiles/files/8462837200.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/fd9f5b613b5dd798532f7785edbc8bc8/tiluluxi.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/41587738071.pdfIn PDF document text
    • http://vigen12.com/userfiles/file/rivekerolutod.pdfIn PDF document text
    • https://whereestar.com/marinarubicon/admin/file/lobunefemon.pdfIn PDF document text
    • http://nerezove-kuchyne.cz/UserFiles/File/57173215056.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_off0000b932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB932 10940 bytes
SHA-256: a19e5eeaa974a71f621d2cc008ffcb785edcaad6bc40e79c6fc41a0aec3eeef4
font_01_sfnt_off0000d24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24C 19556 bytes
SHA-256: 5a3ca740f9f00f008fa0872b54a34528dcbdccda38d48368a173c66652149340
font_02_sfnt_off000104ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1