Malicious PDF — malware analysis report

Static analysis result for SHA-256 e360593feab8c0a8…

MALICIOUS

PDF

83.7 KB Created: 2021-09-08 11:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 58dc5868be1d098e4d3d3651755f679f SHA-1: 3a4c23df83759b563a664472b17b8f64d629c232 SHA-256: e360593feab8c0a8d4461b9d0178e0272a80974f0bf33a50777756f3a5ae7bad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or redirection to malware. Although no scripts were explicitly extracted, the PDF structure and link farm heuristics suggest it's designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f478598c0---4625625204.pdf In PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/5772fc09ae74bae8ceb10c65d4f6bac5/rinurizemurepus.pdfIn PDF document text
    • https://porterbrothersltd.com/app/webroot/uploads/84113823852.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/21932794128.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-7-14/20210714092602775864.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/74720668191.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/fagapuruju.pdfIn PDF document text
    • http://art-lan.ru/uploads/assets/file/matojegele.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160843e9e5cf19---21210316511.pdfIn PDF document text
    • http://daivupaint.com/img-chamthi/files/bofuni.pdfIn PDF document text
    • http://reinforcingourheritage.com/clients/0/08/0860c2a235168fe7e4a745c824023bdd/File/98162064866.pdfIn PDF document text
    • http://joewhitefamilysite.com/clients/59967/File/bavuxajilapevufetudem.pdfIn PDF document text
    • http://coffee33.ru/archive/file/bofukukebipenesafofoxib.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/28883036492.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/zowuvipewipelaponemomoz.pdfIn PDF document text
    • https://4appsoftware.it/file/vudafoparaxukunikofugat.pdfIn PDF document text
    • http://bio86.fr/fichiers/depoporojosexekufifusa.pdfIn PDF document text
    • https://icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/jenejujogenuvusebe.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/wugexojetivewagorepi.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb16106775---donenefulumutot.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fef0f76a04---mirubiguwonelipevosu.pdfIn PDF document text
    • http://www.wiz-fac.com/uploadImg/file/rogeteximizitakenomugizew.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/d2917efd9cbfa7ad7c74dd22f1436d5d/zisarageponorupazanulide.pdfIn PDF document text
    • http://vhshf.de/File/40171738797.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130d7058eef3---66106482707.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/zitemikexore.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+make+pdf+smaller+size+onlinePDF 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_off0000e2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A7 10888 bytes
SHA-256: 36f5237b182cfe7ba61cf5e3a4d26151b3881638c56fa877f6dd182b9cf22340
font_01_sfnt_off0000fbd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD5 17652 bytes
SHA-256: 1762ab93c3507561738bf36f1b5ef3116d22fc36055920b03d2de679810e27a6
font_02_sfnt_off0001289f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1289F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1