Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d5415277ce7acbd…

MALICIOUS

PDF

79.0 KB Created: 2021-09-05 17:14:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 552733496c4f8e60f58e85b72e190e4c SHA-1: 4e77f1f0a2aed6ddba20d86664917e5f416085c7 SHA-256: 2d5415277ce7acbd8c7b5fbd75adf906a679069903cce06e143ef2d57f613a19
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or IP addresses, suggesting it functions as a link farm or phishing lure. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://wastran.ru/uplcv?utm_term=cuptor+gorenje+simplicity+manual+utilizare PDF link annotation
    • http://www.monts.sk/upload_images/file/mekipanotawowi.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a7750f81b---magonijutexekawomomipanuz.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/25da20facb9987751c7c17377db15937/52570802626.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/walogovat.pdfIn PDF document text
    • http://www.serge-valentin.net/ckfinder/userfiles/files/12971356617.pdfIn PDF document text
    • http://dogoxuavanay.vn/uploads/files/94012075124.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/fijikerijetew.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a06c15ed3---23432204066.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/f435b90daa974e5f1839e08bfdce05a3/niboxibetewixotozisiga.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f013d240d8---nagokepurajukewapekopurok.pdfIn PDF document text
    • http://kazuma.ru/ckfinder/userfiles/files/96567231242.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/majufimudosejidovevux.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/timirafutafadu.pdfIn PDF document text
    • http://salespate.com/userfiles/file/96863866576.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3f81a0376---pasoxesufajekudar.pdfPDF link annotation
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/ropedutipezul.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16086c16b09863---63292120229.pdfIn PDF document text
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/64112621053.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610bb1383a13e---55754581648.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc8b1ad3ecf---kosuderikufaxovev.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f249811964---9221279475.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d31e11814---wedemu.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/1507953b5ce42bbf70b5e550e0cd545f/71168869578.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a094dfc0c6f---36154567515.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://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_off0000d2e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E5 16784 bytes
SHA-256: 3cbffbeb02faf03c7fe8e492a98c936189b8456fd3511dbb70d77e028e90e3e0
font_01_sfnt_off0000fe22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11639 11152 bytes
SHA-256: 1b416cbffed063c0bca3e5e1f914ebb88837953e591da82bfe1089f036633951