Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e98ed83f4ae5667…

MALICIOUS

PDF

76.4 KB Created: 2021-09-03 07:55:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: f9862644902172cb4305e9c347645b38 SHA-1: 08754fe586df7449ed2d21e8fb2b8e372dc37b50 SHA-256: 7e98ed83f4ae56675bee2ee98c1ab59bfec5963d5252e4375f4f934c09bd6955
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress upload directories. The primary purpose seems to be directing users to potentially malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://my-natural-style.net/upload/files/75551688498.pdf In PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/975d92edeabefeea325858a66e641206/38886738340.pdfIn PDF document text
    • https://speculatio.in/ci/userfiles/files/94615953524.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/notesidezumixagunutijej.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072745f48402---30458604075.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/40fc3899e4ac5d8c8f5aeb8731b8e219/wemewamixuro.pdfIn PDF document text
    • http://joyerialaplaza.com/ckfinder/userfiles/files/wetavuko.pdfIn PDF document text
    • http://casadiriposomarsala.it/userfiles/files/32220476778.pdfIn PDF document text
    • http://herium.net/FileData/ckfinder/files/20210719_DAC4C368CF60F9EC.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/ruxowelufabutawazige.pdfIn PDF document text
    • https://belitour.ir/basefile/belitourir/files/95048645343.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/34358984588.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3486a0617---valipobegido.pdfIn PDF document text
    • http://psycare-spb.com/userfiles/file/lesixezowaruganu.pdfIn PDF document text
    • http://imaginove.eu/data/Files/wiwodesegoda.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/7a04eb718750ab37818c4ba21d68d4f5/57235236865.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/cqtm89cahjj1vn55t5tonb3m76/ladowubem.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/1fbcdd861847e0d36b5dbfd6354ea522/banogafineze.pdfIn PDF document text
    • http://studiotecnicofrisoli.com/userfiles/files/54241499760.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f69757eb35f---ximaf.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e6561a1d6---55683645691.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/vilekudes.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/9e296eb88fb27159246c6b7cd5f129d7/zejomegajaketuz.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/fujimuw.pdfIn PDF document text
    • http://myphamlulanjina.com/upload/files/2466847086.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=drager+alcotest+3000+calibration+manualPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC79A 16732 bytes
SHA-256: 2e261cfffd8d21734f467a2a8757ac339a2d03bdfb6ba194b5b713ef25561b32
font_01_sfnt_off0000f229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF229 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A40 11108 bytes
SHA-256: 3fbf2e19142c8883a8886cc29ad575f7a9e389d04052cf8f8744276e67ab5041