Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0a0d53b34f1206c…

MALICIOUS

PDF

118.8 KB Created: 2021-07-01 00:25:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 78a2f107d9200c0c1f008116cfc3f09b SHA-1: cfaff29493b347b451f244954ee84b04faabf73e SHA-256: e0a0d53b34f1206c246f7f2386e90355fc2942a39991187ea474dd66be9cec50
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of links, many pointing to compromised WordPress upload directories and other disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate the primary function is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=index+of+the+good+doctor+season+1
    • https://pharma-tools.eu/galeria/file/41025746993.pdf
    • https://uniqrelation.com/userfiles/file/47507938078.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833b9ed943f---40742813435.pdf
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/62b2c8f0ba8647364e9e94e0da5d5a58/boloxagufutimazope.pdf
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/ab8794fe5d8c5e1cd93b1dddecd1a5ec/76419759373.pdf
    • http://ruegen-ferienhaus-schneider.de/userfiles/file/zidujurux.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ece76ed386---59904734026.pdf
    • https://prokoncept.hu/admin/blogfck/image/file/dofel.pdf
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/63177062043.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/1a18d04adad1e42fbb44e7a9c35d2ecd/63727408789.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/57b479bfd7d2bb92db602451e87733a6/difomokedugemuforuvelu.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/046ec1d7c89fd583569a87aad8564097/64867481566.pdf
    • https://nacionalequipamentos.com/ckeditor/uploads/files/gipuvugokikosuze.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160abd59b0a6f2---buzukomifu.pdf
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/38fe7f7285c796d41a69d36a69d535c2/darifozoz.pdf
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/97340d831108f76d839b674acd481e53/93477184858.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/a792cccbea7b06419007ac806fe2fba1/37713961668.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/f85c12e63561c3edeb29224c80f1c023/98199232996.pdf
    • https://samtee.com/admin/images/file/jotawofipudonemepi.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1a6826277---22704302118.pdf
    • http://happyhanool.com/ckupload/files/10640227872.pdf
    • https://angkoronetour.com/userfiles/file/mabinitibagerepiku.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160be09f8ae9da---13666958254.pdf
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/d9ac77387a36dbe04729cc8b5d9a3bea/83099083991.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a98e62525fd---xakukopa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000166dd.bin
05ccb977e5943096189727c9c827a4dff9166148d55c41e0ce4d81640d0e1744
pdf-font-stream PDF embedded font (sfnt) at offset 0x166DD 10720 bytes
font_01_sfnt_off00017f4c.bin
43aa287b67a51b175825430b6bbce677d4b796fc3038d136e4bcd7142c4dd719
pdf-font-stream PDF embedded font (sfnt) at offset 0x17F4C 21308 bytes
font_02_sfnt_off0001b5a8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5A8 16792 bytes