Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3562de9926b6ca4…

MALICIOUS

PDF

76.1 KB Created: 2021-09-11 09:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e096a974bb4d595b27e3f7666bcd52b7 SHA-1: 919f4c05c797932e3e544d67f772c3b7ee80ac0a SHA-256: b3562de9926b6ca49afa2754dc07e375a0838a3e637294358cf5374da01ee210
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and ClamAV as malicious, indicating a phishing or malware distribution attempt. The document contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the presence of external links and the overall detection profile strongly suggest an intent to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://synerhu.ru/uplcv?utm_term=miley+cyrus+usa+lyrics PDF link annotation
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/j1o9ouh28t6j3nsqmr00elf1ab/22218730773.pdfIn PDF document text
    • https://tiguan-wiki.ru/file/57392624241.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613446339ba26---pafotesavajamalireleto.pdfIn PDF document text
    • http://goksirkrupskimlyn.pl/img/upload/files/duvogemokugozizaxo.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16133472ec2b6d---67551694861.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16132e2d507e0e---23100484263.pdfIn PDF document text
    • http://naphogacomposite.com/upload/files/57983995052.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f61f4d416---vegemetuv.pdfIn PDF document text
    • http://www.polni.si/Images/files/bitaxusezopasal.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613762df20302---16910456322.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/vurafur.pdfIn PDF document text
    • http://mudrkanuch.sk/editor_uploads/system/files/totigudon.pdfIn PDF document text
    • http://kuryakyn.ru/userfiles/file/63839069433.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///20210908224549_46322014.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/d3e76fdae7e39ddfa0eeb8ed712d380e/vabod.pdfIn PDF document text
    • https://ketdoanbus.com/webroot/img/files/befukomokir.pdfIn PDF document text
    • http://aqs-group.it/userfiles/files/zusuzunarafajafijexu.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/wofafatonilir.pdfIn PDF document text
    • http://shopabrang.com/images/files/82701302672.pdfIn PDF document text
    • http://receptlap.hu/files/temujan.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/lelajelepolaxas.pdfIn PDF document text
    • http://newtarrytowndeli.com/uploads/files/62438198900.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/v1pcnh6p40jff9o08ijgdlfbu2/mewaxalobo.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_off0000c709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC709 17628 bytes
SHA-256: 92826c81f1bf7ec3192a581fca9048c815ecc5549d7c86f39f810901d6b355d1
font_01_sfnt_off0000f43d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43D 10108 bytes
SHA-256: d883c70cae3ae226ccdaa1bb7ad585f360d40faa6ce2aaf73216851c3d9fd908
font_02_sfnt_off00010af0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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