Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea048f2e7f9fd004…

MALICIOUS

PDF

71.3 KB Created: 2021-09-07 11:37:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a57fff516bc72035feeda7daed8f21a9 SHA-1: 10eeda5fc9c0fbd7cf7f002ee5881b45976452a8 SHA-256: ea048f2e7f9fd00459e365703f340dd7039c329d030f3acda565bac00146781e
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting, indicative of a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://allytemp.ru/uplcv?utm_term=tricolore+5e+edition+pdf PDF link annotation
    • https://takarasushimn.com/userfiles/files/vijevawepobakuzixasixagas.pdfIn PDF document text
    • http://superplasticizer.cn/d/files/duxesubarajedudojixid.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/9ddca0007852281fd5b45e58bb02a2b9/37346461250.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c56286c31f9---43655502623.pdfIn PDF document text
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/gijupuxir.pdfIn PDF document text
    • http://www.saletime.gr/admin/fckfiles/file/zikagojojobogolek.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/46151329643.pdfIn PDF document text
    • https://art-lamps-rali.eu/files/file/nitiwelun.pdfIn PDF document text
    • https://baobihungphu.com/media/ftp/file/25999667783.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/33136922362.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b3375ff15---48819881254.pdfIn PDF document text
    • https://rumahbaruku.com/contents//files/37443617147.pdfIn PDF document text
    • http://gptools.net/userfiles/file/24922131753.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/o3fag63odcud42asgte4ehq293/pimibebawesawomoniluzevob.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/nipeperanukelubadumojive.pdfIn PDF document text
    • http://www.recko.ru/ckfinder/userfiles/files/xifozolasubimoguferupi.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/92902fa754021e69d6399d57f0427db5/mibomovim.pdfIn PDF document text
    • http://elitsatodorova.com/uploadfiles/file/59620360624.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607185f993cd5---9944282530.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb57091ff6---62889929183.pdfIn PDF document text
    • https://mattress-leader.com/media/68105185868.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160837880bdd9b---1396451685.pdfIn PDF document text
    • https://butchercurnow.com/img/shop//contents/40177227873.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1608d00e660584---zudifamokoz.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_off0000b51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB51F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD36 10380 bytes
SHA-256: 989281690fc356ea8058a5e17d3a810703fdadec06c044d97bd238809b542283
font_02_sfnt_off0000e4c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C7 17048 bytes
SHA-256: a7c251380757bf3f7b7f34c3f98324df0fdb9dfdb2ced5d9aef707764b994495

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