Malicious PDF — malware analysis report

Static analysis result for SHA-256 3471f315e45bbd7a…

MALICIOUS

PDF

71.7 KB Created: 2021-09-03 02:10:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c5b6d4af02516d73e9b1aeb1a23617b9 SHA-1: 141eb69f0f7f79ffdbf85b8e9d73cf474d0e88d9 SHA-256: 3471f315e45bbd7acc88f43cdaaa8c1212d2217550c774374caea457b6101ea5
184 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised CMS uploads or IP addresses, indicating an attempt to host and distribute further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading malware via these links. The presence of embedded JavaScript suggests it may be used to facilitate the download or execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • 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://tokstar.com/_UploadFile/Images/file/58305248699.pdf In PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/695b8518f02730c3a9952a69842a8a2f/54212128052.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/88915730883.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/5d6ea9ps48v6sjt6q3qkgbcpp0/sugatujefuserunelajudewo.pdfIn PDF document text
    • http://www.fdconsult.qa/public/uploads/cms_files/worogep.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a28c53436---38859940194.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083dffcb7e57---55397838180.pdfPDF link annotation
    • http://sklepjola.pl/userfiles/file/82044749714.pdfIn PDF document text
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/18408273652.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop/contents/nuragaridekan.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/nazulawikilak.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/cc2151ad8acd6f890f6686788693bcd4/boxub.pdfIn PDF document text
    • https://led7.ru/file/36024395462.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f32e2b1fdeb---nuregokezeriw.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/75384773614.pdfIn PDF document text
    • http://www.asslar.de/downloads/kowuj.pdfIn PDF document text
    • http://rooptex.com/uploads/narowarojemi.pdfIn PDF document text
    • https://samsungklima.net/upload/ckfinder/files/68052206125.pdfIn PDF document text
    • http://concurs-euclid.ro/upload/fck/vupevibawezexemixalek.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c65dfc066c2---nasitatemasizeves.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/95b93b2b1b72875ba93022f323222df1/bibaxipejeb.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f93c3c96b---jipipumaxusediz.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/88223589662.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=formulas+generales+de+fisica+pdfPDF 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_off0000b7c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7C1 10944 bytes
SHA-256: c1023dcebf32a151949d2b9bae22d252c4cc361b78cf3abba08676f2e6a015aa
font_01_sfnt_off0000d0d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D8 15380 bytes
SHA-256: a9945fae1d54577fe9159c786348d43e14ca163d47ce06e3885e0f0024bf8679
font_02_sfnt_off0000f72d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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