Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c6d27eda6846cb6…

MALICIOUS

PDF

83.4 KB Created: 2021-07-03 14:15:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 934d24e232cce9cec8cab6972d7fe770 SHA-1: ddc7d38810b0d4507b710700fde4fdd351b19b3a SHA-256: 5c6d27eda6846cb6e713f075d168b21b72a577363aa504532c7aff5de2d0505f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to compromised WordPress sites and other domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://laborke.ru/uplcv?utm_term=drawing+of+a+girl+for+beginners PDF link annotation
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16091d2bfd0f6b---86968182158.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a12e2b4710b---rozetugodegikesanozudapo.pdfIn PDF document text
    • http://kruengrangthai.com/files/files/68608167749.pdfIn PDF document text
    • https://villamishkan.com/310renonew/front/images/files/59369962659.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc2a44c797c---15739940062.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/zupinos.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/af43e1c975ed940dfd49818ae413e3a0/madezonakofazesuvawo.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086c3e1b7b0c---92596535479.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bb9e973ce---81833612444.pdfIn PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xigitugunud.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3940bd4fe9---ligidajabavasafuwibok.pdfIn PDF document text
    • http://chromavials.com/d/files/bavakotadiwuxopolowuz.pdfIn PDF document text
    • http://www.cenlafilm.com/siteuploads/editorimg/file/53739324782.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16094755ac341c---foregividomen.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/551795338.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a662c27b98---20391215512.pdfIn PDF document text
    • http://temple.mo/userfiles/file/90701909902.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/xowurupazo.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4553fc03f3b6adb5d34cbc0d55a0ec61/64239802379.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2f8b31fb1---xowaxubanulofu.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/62da4f9d2de69520ef1543b1199c70b4/57347454220.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607647b329f9d---jujanoradotexel.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9011ca3af3---jipagipesimezasokelew.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/qt1gu53d0bjq9b6oid4de2g5ec/zofuxerufarimog.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/31p879q14vi0gsgisd2e5q6da3/54952324446.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_off0000e65d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65D 16152 bytes
SHA-256: 6d06ff6bc32b39525e0e4c81d16e9b3418e624ff7e1b2846a003085796265fc9
font_01_sfnt_off00010fe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000127fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127FE 10516 bytes
SHA-256: 0201720974fc8c45b2362d6cd3e2043d28fe60de807aa30eba5ea8c2b1192152