Malicious PDF — malware analysis report

Static analysis result for SHA-256 b79cacbb2c89448c…

MALICIOUS

PDF

85.3 KB Created: 2021-08-27 18:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e468071d44a63b8d4db864d972554386 SHA-1: 15be987610d3fa2951b4224e5bd1e620c64d0e2a SHA-256: b79cacbb2c89448c5d3817635d8cb4cb57c908697977eaf31e511cc72a1d24af
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and other disposable hosting sites. These links likely serve as a distribution point for phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16079f3b3218e4---3904110470.pdf In PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16070f87e1e071---nadizamakutili.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/2665e4da8a53974811a3108bae5d91d5/fekotaxoxirowifogurapeg.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/rufawav.pdfIn PDF document text
    • https://fasleh.net/Files/files/52383880478.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/15df923fbb5d9f56467dc70d017cdc06/dibile.pdfIn PDF document text
    • https://mangallagn.com/images/file/lazolepekirimapuzuvalol.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/8d35cb6c5c8aeace3b312cf27e5dac7d/sobemonavamozipekuxasif.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/2c7ve1cakar7lr1n1e0grhopem/6523080730.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/navozoxaxewonuledeziwijuk.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/20387090092.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2102dff5b---nevumuxefobazotukepugej.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/zuxerasojomanumuwis.pdfIn PDF document text
    • https://ikima.fr/uploads/file/38608776766.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c6774bad8---zogukagepuzo.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/du3hhoo1mth94gh478icdb0h2h/52484566312.pdfIn PDF document text
    • http://astro2sphere.com/admin/images/file/33008652142.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021082612451183.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/d88b6c9422d1754c963d266c087d2feb/supijevokafikisiretelivo.pdfIn PDF document text
    • http://wsm.hk/images/files/73547223648.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1608035c4b21cf---35178014346.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8dfbe2c81---10089593740.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/larorajelo.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/16128dc51c3dbb---kukovemazebewe.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/wuwovutovemejuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=pink+related+quotesPDF link annotation
    • 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_off0000e456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE456 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6D 10580 bytes
SHA-256: 9fd4993c00913b37df99a951e7b5f3cbe1d8d53830845fff34dda06baa934e6d
font_02_sfnt_off00011472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11472 19240 bytes
SHA-256: ce6cd0f5521c8f366c80c31ec751640a3c3881999caee2dcd5920ac32f92fb1b

Open this report in the interactive analyzer, or submit your own file for analysis.