Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f124ac747896462…

MALICIOUS

PDF

94.1 KB Created: 2021-09-09 22:27:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0a3a426ecdbee3d4b48bbcdb92056bba SHA-1: 70e3bcb4e95eed9f7076754a580ec1705b407691 SHA-256: 0f124ac74789646255daee1b0adb21efc51fc468983285ea447ad651ae24b6f2
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to redirect users. ClamAV and ML classifiers identified this file as malicious, specifically flagging it as a phishing trojan. The presence of multiple links to potentially malicious sites strongly suggests an attempt to lure users to phishing or malware-hosting pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16132a3cc06be9---boduzevosowe.pdf In PDF document text
    • http://sumosushingrill.com/uploads/files/75002689407.pdfIn PDF document text
    • https://nileagriculturalindustries.com/file/nuwafidupijegolufudimaz.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161309f0e7c3bf---42276465677.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/files/20636569245.pdfIn PDF document text
    • http://chukysovin.com/img-svc/files/23070505789.pdfIn PDF document text
    • http://cmtsport.com/pliki/61963004267.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210907172358.pdfIn PDF document text
    • https://maxlinder.com/admin/assets/ckfinder/userfiles/files/52952147370.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/8b39b0362f05fa6e7e34e20983a498a9/23831875855.pdfIn PDF document text
    • http://kirsanov-maslo.ru/uploads/foziwuwapuzitasota.pdfIn PDF document text
    • http://memsports.com.br/admin/libs/ckeditor/ckfinder/files/90953556264.pdfIn PDF document text
    • https://art-eria.pl/mandarynka/pliki/files/xodogifofavexewopemip.pdfIn PDF document text
    • https://www.winsum.frl/ckfinder/userfiles/files/kefemekowum.pdfIn PDF document text
    • http://bakefruit.com/uploads/files/202109051702162288.pdfIn PDF document text
    • http://www.accl-calibration.com/login/ckfinder/userfiles/files/71479402794.pdfIn PDF document text
    • http://compagniaviaggi.gattinonimondodivacanze.it/themes/userfiles/files/gizubeguxevak.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/rivesezugexituripigub.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/202194225133307.pdfIn PDF document text
    • http://france-ex.com/images/blog/file/89362465692.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/ciclfi39o22f0afvu1ou2di5n7/xewumujemeto.pdfIn PDF document text
    • http://lionsmarsala.it/userfiles/files/57597953257.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=ultimate+douchebag+workout+2+unblockedPDF link annotation
    • http://mustang.tom.ru/jsplugins/ckfinder/userfiles/files/viwolifinugabun.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_off000105af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AF 11192 bytes
SHA-256: 74e0234e52f6833d79366bc9a1ec089f2cd12a21aa9d63b9d226ef306ce0c634
font_01_sfnt_off00011f84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F84 19520 bytes
SHA-256: 8faef3835f04f89af8ab78ff346daf05b2dfc727c66e52a226650f4578c61a06
font_02_sfnt_off000152ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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