Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1de5e9f05264577…

MALICIOUS

PDF

91.2 KB Created: 2021-07-15 18:37:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 249ebc35684c29025d7ba0334365c737 SHA-1: 40a28b4eeed9655cd66c6c32cc22b0701f71864a SHA-256: d1de5e9f0526457747c8e4525025b54caaa204d65e17129cbc3d14a7a4f4700e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting a phishing or malware distribution campaign. The PDF structure and embedded links are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://huntic.ru/uplcv?utm_term=life+insurance+policy+becomes+incontestable PDF link annotation
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16087784a3a921---fiwikevegitorodofulax.pdfIn PDF document text
    • http://www.emailposte.com/pictures/xixidotinomisevagepede.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/9581eb80805579f7a2127bd17e4d35e8/lefivopemusulir.pdfIn PDF document text
    • https://butterfly-propertymanagement.com/userfiles/file/kimafelimidenowoxunovadi.pdfIn PDF document text
    • https://cdmsig.com/ckfinder/userfiles/files/18583025535.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8b594b224666d2dc8c6272331a251ea5/wovelini.pdfIn PDF document text
    • http://tiwtactic.com/userfiles/files/48913095852.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607249a8481dc---bojanumej.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/52800114526513a02148b7ec19486ceb/limulobopanakiwalog.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/31710780154.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a934e52fbc---gibitobununibadak.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/venewugawinexujajavivozak.pdfIn PDF document text
    • http://inbeeldt.nl/userfiles/file/fawurogusegubij.pdfIn PDF document text
    • https://aneri12.eu/res/file/jurixavorin.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/5f2110484c05465994c026ea50d57aa3/27452653499.pdfIn PDF document text
    • http://lovemyskindayspa.com/clients/d/d9/d99ed7cf7cbac978b7326c22a81d1608/File/susubafijabomelomoxa.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/22544840522.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/likesevolimavalapasidu.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7de90ee43---sesoxebel.pdfIn PDF document text
    • http://cuhs1981.com/clients/8/82/82ca37c076ec4232796cb58ed009bb3a/File/18636878256.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/aiom5gakj38lame3re677micc7/36133557471.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/89347859736.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8ffda8766---gurirogitiziwa.pdfIn PDF document text
    • http://islandpointfl.com/userimages/kigoliredilaza.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/70821076889.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_off000101a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000119bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BB 10952 bytes
SHA-256: af94ddb34b510d3f2f74625cd5c70fd5ea1c4176ae278d730678526668d8558b
font_02_sfnt_off000132f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132F0 17168 bytes
SHA-256: 8b52c64f23881b53c89580da7bbedd52c2e749388fa1c2fe99175ff9244807ad

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