Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f950fbc3f5d9baf…

MALICIOUS

PDF

106.2 KB Created: 2021-08-15 18:30:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 67e26bcf01cafc245a00474e20d0f673 SHA-1: 2cc02ed5876f0f4c9796ecb427567bd6b63858d9 SHA-256: 2f950fbc3f5d9baffd7b97bbe3492b44c15b89243fd6e71c1dbd7784bff615c9
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript, which is a common technique for delivering malicious content. It also functions as a link farm, directing users to multiple compromised websites, including those hosted on WordPress upload directories. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a phishing or trojan distribution intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.2108

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.
  • 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
  • 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 https://philabc.ru/uplcv?utm_term=what+does+rf+con+mean+on+prepaid+meter PDF link annotation
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/4b3d651c05113a071ccd451a72dbb30d/17487004391.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2381754beb---fuvolevitigam.pdfIn PDF document text
    • http://cfacgroup.com/uploads/FCK_files/file/jawatul.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/f170e92204ca19267dfb6e32d29f501b/71313217099.pdfIn PDF document text
    • https://www.fibertech1.com/my_content/js/ckfinder/userfiles/files/juzemimujazijupolo.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078a2c9db66a---devetivakavatatur.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/cdbbd3cd5c981ec33000c8a92cf830d1/muxar.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/bbec42f8bb948e94ebd76856a77eb836/sewawo.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984a691f283---bibupixumujij.pdfIn PDF document text
    • https://fallahi-sch.com/userfiles/file/78244648677.pdfIn PDF document text
    • http://farashimirooz.com/files/10055895155.pdfIn PDF document text
    • https://airshow-bg.com/file/82358753368.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/912ffded9c9ea8b29680982de73d59ef/25198660146.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/jadunipafefafovabesur.pdfIn PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/8735963924.pdfIn PDF document text
    • http://dharmapuridiocese.com/svnprojects/DHD/Source/images/files/jasusane.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/zikapufija.pdfIn PDF document text
    • http://kimandyoo.com/userfiles/file/23131524156.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/tubiwun.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/28319285560.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16105620a5bb29---xaxenowixekafijobu.pdfIn PDF document text
    • http://huonglonghotel.com/uploads/image/files/56324546466.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/19800849368.pdfIn PDF document text
    • http://creativetechno.in/userfiles/file/15137566977.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15096 19144 bytes
SHA-256: 67c73006f48c7865ee1f6479ea2784807ede1e1c4962af69b6193b8ed584e497
font_01_sfnt_off00018320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18320 10832 bytes
SHA-256: 1724bcaa769e07aa49a19ed7c5cc5762003bde4de4229b61da9d2ac383aa0290