Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdc2da2bf16c7078…

MALICIOUS

PDF

92.6 KB Created: 2021-09-18 19:02:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e5a2832dbc375f86cbd5b35f1307c09b SHA-1: 4f27b2ef5130acdd5af8c5f6c69ac23e36a2d6be SHA-256: fdc2da2bf16c7078dc2e5b9b0fa6283c324f953ba379552a12e3ce530e142e56
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a strategy of using numerous links on disposable hosting, suggesting an attempt to obscure the true malicious destination. The embedded JavaScript likely facilitates the redirection to these malicious sites, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://crysiq.ru/uplcv?utm_term=how+to+install+apk+files+on+chromebook+without+developer+mode PDF link annotation
    • http://madmojo.com/fckupload/file/baxofapisanoxasamotate.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/53e7c49a5ecf0fea942f4bf9affb5195/tojeboguvalapibadake.pdfIn PDF document text
    • http://wedding-box100.com/uploads/files/202109160125288043.pdfIn PDF document text
    • http://abovomedia.hu/_user/file/sexozegipodexufiwejabot.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613caa6e2c4f7---36135637232.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f3af153e26---46053456780.pdfIn PDF document text
    • http://to-kajihan.net/js/upload/files/87584634961.pdfIn PDF document text
    • https://abcoegypt.com/userfiles/files/51020515826.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613168c2c0bb4---jesefidovifozadirupuxoju.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/bf9r686jp9g3b9f3qbc1appic2/vanabarudilegilereta.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/wejodit.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/98259102353.pdfIn PDF document text
    • https://ardiinerkh.mn/uploads/userfiles/files/rosefomametifizopib.pdfIn PDF document text
    • http://phunphu.com/userfiles/file/fukivofogup.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210908031653.pdfIn PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/71320726599.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/q82ogpf9dlca3j282q3g4n0ot5/fepupozarevik.pdfIn PDF document text
    • https://certifiedcollisionrepair.com/home/cert/public_html/ckfinder/userfiles/files/lunol.pdfIn PDF document text
    • http://suurelepa.ee/data/file/25570577799.pdfIn PDF document text
    • http://vkp.ru/upload/global/file/jusajinirovipov.pdfIn PDF document text
    • https://vialivonica.eu/userfiles/files/bavokufusowix.pdfIn PDF document text
    • http://www.farmaciapenil.es/userfiles/files/22043770101.pdfIn PDF document text
    • https://phr4u.com/files/17307142000.pdfIn PDF document text
    • http://lnhaihui.com/userfiles/file/20210906130705_2140775848.pdfIn PDF document text
    • http://clinivetmadonnadirosa.eu/userfiles/files/9634547627.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_off00010169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10169 11360 bytes
SHA-256: 4585be66a2f7d2b48536e435a5ff204c1b23dce7a4af5a806b16de1e3756f91f
font_01_sfnt_off00011bc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133DB 18148 bytes
SHA-256: 9801057fd680839e924b3c9b7fa4781c82ffc8377b1fb858909a5e0fc8e6b2ba

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