Malicious PDF — malware analysis report

Static analysis result for SHA-256 381127c4aab4bfc5…

MALICIOUS

PDF

87.0 KB Created: 2021-07-17 05:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b4ac7621893954609ee9acbfb3be3cdc SHA-1: 7bd01a74c70072970b01fa2ec5a308eff2eb0737 SHA-256: 381127c4aab4bfc5378d1ab49203b192121a20bc9d9c8939b83b5a2176643d5d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute malicious content or conduct phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b455cc34a52---69052242812.pdf In PDF document text
    • http://aaaexpressheating.com/userfiles/file/83633053759.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///82646467287.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a522132a6---genuguniduvotewe.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/a132dfae4efbfe9897ad6aebb101d650/34426507335.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/cd14c50d33ab9232f77772241fc52936/vukoketagixuwapitigure.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0b6acecda---58130030758.pdfIn PDF document text
    • http://sunarfactory.com/userfiles/files/jokikotipejuwakotiz.pdfIn PDF document text
    • http://prtourusa.com/FileData/ckfinder/files/20210701_DD696A5D377EB039.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/40634664763.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/140c21a7cc0eca50e8bfd03808016c2b/96160756114.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e6eedc4e4---rasorowa.pdfIn PDF document text
    • http://fritz-fahrlaender.ch/download/silala.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/8rf9emrjm5hm6o323908pg5vud/52473446586.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/12q7p5apajoo73dl8j2bmudkqn/23228165769.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/tegis.pdfIn PDF document text
    • http://hnsunnyfood.com/d/files/tokulagemokib.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/xokamowok.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7fb4d7a3e---vifokepuvelijusinosogavov.pdfIn PDF document text
    • http://constantcontinuity.com/membership/data//files/wotepajuzuso.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/28123145601.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/0294c695cba5e3cd563f07c83eafb8b1/3511077112.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/njno0tf40a98cvqvjh8abil60o/19208427262.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=pocket+knife+checked+luggagePDF 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_off0000f190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF190 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A2 17340 bytes
SHA-256: 753505bd7a13ae0ac60c50503188925c58855e6b5d07f9d939676c84a5d17659
font_02_sfnt_off000136d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D9 10680 bytes
SHA-256: e2d108b8d208403df5b34c3009421c35315feebedd654ef1fad4acf103cbada9

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