Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7275d0b208b855a…

MALICIOUS

PDF

95.9 KB Created: 2021-09-08 15:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c7f37c494786fe1db08bae5d6402b1ea SHA-1: f712cf78154f210cce3acf7621ecb041f3678bbf SHA-256: e7275d0b208b855a71cfcf2df72a5d225fd32469a3824b1d98dd0e4dcd88dff6
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farm heuristics, indicating its primary purpose is to redirect users to external sites. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The numerous links suggest an attempt to distribute phishing content or malware.

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 https://catamma.ru/uplcv?utm_term=modern+portfolio+theory+and+investment+analysis+9th+edition+pdf PDF link annotation
    • https://calmoinc.com/upload/editor/file/665560331.pdfIn PDF document text
    • http://sabancilojistik.com/userfiles/file/farokenivufevesiros.pdfIn PDF document text
    • http://gamecoast.by/uploads/files/80219217804.pdfIn PDF document text
    • https://yam-token.com/business_school/uploads/file/51806974205.pdfIn PDF document text
    • https://hiroyoung.com/data/files/nojexisala.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137da81e5961---64378774209.pdfIn PDF document text
    • https://linkevicius.com/upload/galery/file/25613153678.pdfIn PDF document text
    • http://gabinetortodontyczny.eu/userfiles/file/xobewunizudevuzajuned.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210901161711.pdfIn PDF document text
    • http://www.civilhospitalpalampur.in/img/uploads/files/36534987288.pdfIn PDF document text
    • http://gddfboiler.com/uploads/files/jotiluzomoribojemorate.pdfIn PDF document text
    • http://www.srijonihealinghome.com/fckimages/file/77744462061.pdfIn PDF document text
    • http://vietcem.vn/public/default/ckeditor/files/puligugavosoduramikeso.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/pbibo92fmvt3vnftv4nup4r157/71346846343.pdfIn PDF document text
    • http://chemonova.com/FCKeditor/file/8172596129.pdfIn PDF document text
    • https://equipelec.fr/ckfinder/userfiles/files/70429477922.pdfIn PDF document text
    • https://alkathirilaw.com/userfiles/files/22340972138.pdfIn PDF document text
    • http://serviphony.com/tinymce/jscripts/tiny_mce/plugins/phpimage/phpimage/upload/images/file/41530902708.pdfIn PDF document text
    • http://designgaleria.hu/userfiles/file/wovasibotarof.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/653001d9eef0e30be7fa924e3e44e6b0/kukadov.pdfIn PDF document text
    • http://mim2010.ru/userfiles/file/jijelosizunositosaboxolu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d919f0940---xudaj.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/49451116009.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_off00010aa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA5 20244 bytes
SHA-256: b5b12b9e6bc7b47d6dd4e6e728146b15a5fdb521328d5a2e74cc192865cb7b94
font_01_sfnt_off00013fc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000157da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157DA 11104 bytes
SHA-256: b973ba7c60d583f2dcfe1e1410fd685a9867a6907a661fffe420e0de2c942a03