Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f27bca4afc7d565…

MALICIOUS

PDF

89.5 KB Created: 2021-07-06 12:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0311c3d5be4d094fa3224696eece79db SHA-1: 87bacbadd820524c1cc1c41a898d4f5aff657b5a SHA-256: 9f27bca4afc7d5659359bcaabdb7e95d1e210aa1e43262704d9f13b575e7d4d0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. The document contains numerous URLs, many pointing to compromised CMS upload storage or disposable hosting, suggesting an attempt to redirect users to malicious sites. The heuristic 'SE_CALLBACK_LURE' indicates the document may be designed to trick users into calling a fraudulent support number.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://archism.ru/uplcv?utm_term=woodmore+towne+center+apartments PDF link annotation
    • http://all-pass.com/folder/editor/file/xatunarudaxo.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/dujilesudor.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/65223595683.pdfIn PDF document text
    • http://zxsolar.com/d/files/72611693878.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/nd3795793e6ps182vqqp91b0k1/61979553718.pdfIn PDF document text
    • http://uticachemical.com/files/upload/files/sukaxodilalefatoxuzijo.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8752d9c08b---misalutijefo.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b034a6ae4c7---xodebutomibor.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f827f2a98e---fudob.pdfIn PDF document text
    • http://glenbrooksouth1970.com/clients/1/17/17fc1bd13d5538a69f39d58c869d2fc5/File/nukilokew.pdfIn PDF document text
    • https://art4you.sk/editor_uploads/system/files/59737799074.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d5a77f2e1d6---32703811193.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/cdf3539928027b73c62248e8d853265a/vunelutekupuxisesu.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/72564fa2d630d7ad2a7b97289fc9e921/20086704055.pdfIn PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/tilunufosasobuxileme.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b55e642be1a---61937598568.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/a2e3be8d072644cb6de5ae53ba665c88/nepogomanodukogipubopek.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/b20d3a90e177555b506f50b19ae4907d/15981888173.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c153577551---rotajobikavomarixikezu.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/50314565038.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/65169711215.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/90942590934.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608be01839421---27971783584.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_off0000fa02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA02 17596 bytes
SHA-256: afcc69c968023dce73f20be716cfd1d30453e2b080b5bdc64550380cca4a9b67
font_01_sfnt_off00012867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12867 10616 bytes
SHA-256: 7d8521e1897c798114626f71a17a178ff48890a3ffcad54044655809bb2dae73
font_02_sfnt_off000140b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1