Malicious PDF — malware analysis report

Static analysis result for SHA-256 e079b9391bbb0d36…

MALICIOUS

PDF

83.0 KB Created: 2021-09-04 02:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f108c37263a4a4b305155a502fde6c1a SHA-1: c3d17b0ac9947c3e9234a131c65e6f9d9e1032c6 SHA-256: e079b9391bbb0d36c8d422c2a3e0424141a434cb84c1b1fc11e8a1d47ccfa09e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for executing malicious code. The file also exhibits characteristics of a link farm, pointing to multiple external URLs hosted on compromised websites. These URLs likely serve as redirects to phishing pages or further malware downloads, as indicated by the ClamAV detection and ML classifier.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b26995d85e---45314378075.pdf In PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/d84a649948a31d26ac91b4b3ecd349be/39056860950.pdfIn PDF document text
    • https://alev.az/userfiles/file/73731283801.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/926241eaf5555ba812170b2a1b472707/98162076833.pdfIn PDF document text
    • http://tele-fonika.pl/upload/file/52767931357.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/575d90d2ce15c0c129cc04e98f149146/30563943011.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e47ae62215---dobelabekikulorajupenuna.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16102c9c2ec65b---vijagumakakevewumus.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7410d18d1---73263021279.pdfIn PDF document text
    • http://www.vinoplaza.nl/img/upload/files/43354466560.pdfIn PDF document text
    • http://championsview.net/userimages/49795086493.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/gilij.pdfIn PDF document text
    • http://chamdure.com/DATA/files/20508048347.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/xetodujizole.pdfIn PDF document text
    • https://eingangrad.ch/userfiles/files/90346236405.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7b2d1f64d---fawododuniwepimij.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612d0b75d868a---nigazizefosajamogodove.pdfIn PDF document text
    • http://go-pxl.com/uploads/files/43859783133.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/9fbe45457dbcb6a871e1cb344b172d70/61692720709.pdfIn PDF document text
    • https://zapret-rf.org/web/img/podborky/files/34536151034.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/77609415610.pdfIn PDF document text
    • http://fotografiafrancescosomma.com/userfiles/files/14720326581.pdfIn PDF document text
    • http://hebammenglueck.de/ckfinder/userfiles/files/94549160869.pdfIn PDF document text
    • http://christmaslandint.com/userfiles/neferoxuxuzodukifitamiwi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=bacteriological+analytical+manual+fda+pdfPDF 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_off0000e21a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA31 11060 bytes
SHA-256: e74eabcba99b0cb6f51ec9ba36cfcd3daa7827710cdcb7471ddd7bd15173c0d3
font_02_sfnt_off000113c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C2 16368 bytes
SHA-256: ca61fc984fcfc071a3134de6f5daf7676ac011f49fb61d60c6ab19fed09bbcdd