Malicious PDF — malware analysis report

Static analysis result for SHA-256 44d4a7ea179034ee…

MALICIOUS

PDF

82.3 KB Created: 2021-08-19 08:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 48243175f1448d50153e32a65d7afb16 SHA-1: d580803ce88e9b748012a36a6c3a2e5f9edba213 SHA-256: 44d4a7ea179034eeae6c23d98b7aad7ad6ec8ff8a57eb6b90f4b2cc69c452375
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The document body is unreadable, but the heuristic firings and numerous unknown reputation URLs suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • 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.
  • 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://sjhtractor.com/d/files/22542374151.pdf In PDF document text
    • https://nadinerogger.ch/userfiles/files/dizobasamuniwilejuwo.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/20210710/210710083222354981sx0mpax11xdo.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa0171a718---60266831945.pdfIn PDF document text
    • http://cautrucpalang.vn/webroot/img/files/nepaxutawodoniligopo.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c154319f771---70908310069.pdfIn PDF document text
    • https://numen-wow.com/userfiles/cloud//files/nojomifitisaxeritipaga.pdfIn PDF document text
    • https://birotex.rs/images/files/zabozoseteg.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/18655324726.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160e168c49c99f---55959030004.pdfIn PDF document text
    • https://cabsfromheathrow.com/userfiles/file/64409978217.pdfIn PDF document text
    • https://megalightgroup.lv/uploads/files/87682156904.pdfIn PDF document text
    • https://mollis.rs//files/zamomazar.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/95579877014.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608be5293c3dd---73681305198.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/8p9c5h88hrpm2soli4c4dv9q71/tedodenonapatagunizidowol.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/2ab9db342c15abe3f324da5bb5471d70/94055242919.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/14171598675.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16085e469e9f76---vigojagimamuzuwixu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe3a5b2ddac---nojoxoro.pdfIn PDF document text
    • http://khacdautron.com/Images_upload/files/wewafapoke.pdfIn PDF document text
    • http://perchegouet.com/ckfinder/userfiles/files/xezoketevafovarowone.pdfIn PDF document text
    • http://safarang.com/basefile/files/novuberimufenopuvunelegu.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/00940a478a6be38bb9ce2f823f901730/rogewedomisatofovajodito.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=biolog%C3%ADa+curtis+barnes+7+edicion+pdf+gratisPDF 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_off0000d6f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0F 11200 bytes
SHA-256: da0a6ce5a4bc7b832802ff4b664e7c63eadb70fd0a64068bce2b806e38235d3b
font_02_sfnt_off0001090f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090F 18644 bytes
SHA-256: bc8628d83d0c826f09bc252b6aa43a6e500b919eb355a2db2093bd5e97bc2c1b

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