Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7600ae0c8c3dd30…

MALICIOUS

PDF

75.2 KB Created: 2021-07-02 07:13:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c949b3292acd215ad193554d92347fa7 SHA-1: e4ed14f6d20bbd4222afde892d7e3694d79ffe3e SHA-256: e7600ae0c8c3dd304926ebaca7de8250afc1318f564147160659d5f41618be1b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The presence of multiple external URIs and link farm heuristics indicates a high likelihood of spearphishing attachment and exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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.
  • 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://cructi.ru/uplcv?utm_term=she%27s+all+that+full+movie+online+free PDF link annotation
    • http://patriabrno.cz/userfiles/files/64217365807.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16074a16c4e279---30620280590.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/62412106446.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/povajalu.pdfIn PDF document text
    • http://kaowei.tw/image/files/20210603_125114.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/22170961578.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/b811ei2l9hirp3ucqfp7ba4cg8/xanudugi.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f723de43e7---62112230830.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ebffa05ec2---kiwojojodeza.pdfIn PDF document text
    • http://sambometal.com/dataroom/file/bidex.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5156da859---61751665162.pdfIn PDF document text
    • http://teraval.cz/res/file/26227634288.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/dupudepezavepizimaj.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/64170832126.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b925c22e6c7---kizasagapofe.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/26992524267.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/74267112318.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/69b5c309ce1d2d1b4aa8b545346c83aa/parikajumakorifimi.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/029d18dfd6f7e3af2bdeab7204812d53/saritufosevedifox.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077ad2f60170---zozevaso.pdfIn PDF document text
    • http://sam-global.info/files/file/budifogope.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/97866419fc62b0815cd97b22c0c4aad5/pimaretamubive.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/e799c3f835f11caf735ef79ae19923da/72842468806.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_off0000c3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3B4 16804 bytes
SHA-256: 6aeaee7d7f7e8e2d789b4c682f3974f46f196e8efccc32ec125175c9caaeb50d
font_01_sfnt_off0000ee94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE94 10756 bytes
SHA-256: 2c320aa894d485790f74408757883b55ca1279832d627630970c42106f42a9df
font_02_sfnt_off00010739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10739 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1