Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0149d5cb5b49662…

MALICIOUS

PDF

74.4 KB Created: 2021-08-29 03:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b1ffb08cd82bc246d9b82e95e87e9656 SHA-1: 97b99f66e0d25e06ee73bd8383cacd3af2bfa7ab SHA-256: d0149d5cb5b49662746e63fc99be0204c054b6d6c7cd6617932b65f921fb0c54
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to lead users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier's high score further support its malicious nature. The primary function appears to be directing users to potentially harmful sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://queure.ru/uplcv?utm_term=define+gross+national+product PDF link annotation
    • https://rawoctane.com/uploads/file/jowotivisem.pdfIn PDF document text
    • https://doktor-ara.com/userfiles/files/tetiwasujaboka.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/fowunubamas.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/cdvhsnocsmp8udcuv9og4kvnu3/24564204179.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/razuj.pdfIn PDF document text
    • http://sloplast.com/userfiles/files/ruvajulowidakujuluz.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/7il4ktco6lrfo7du0jsbb6cu61/18039726389.pdfIn PDF document text
    • http://palenice.net/obrazky_clanky/file/17603573329.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4cc053c88d97c3a0ef51b58f673f7775/95744914022.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab87c7318a0---salobazinawalotu.pdfIn PDF document text
    • https://fundacionamigosdelmarcaribe.ong/ckfinder/userfiles/files/kukuwofedelanavojun.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/01b753de1188740293c9f34b89cb7ecd/mupijirubopuxa.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4657901d14---29841080667.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/61934687370.pdfIn PDF document text
    • http://minhanh.com/files/94643415838.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/5496804694.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/d4e3882e12c93170e499192e53f2744e/lapakoli.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/c42593e1ed5bcf65275cb24ee8e6ee93/52038150024.pdfIn PDF document text
    • http://warwick-ems.org/userfiles/file/79550677332.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/sukap.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fca93f25b9---47612717046.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/181916492541.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/36054538376.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/o9cr67f2isriuup098kchdute7/99041004985.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/3e676b458df8a970599241984f066200/saxevotazunevuv.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_off0000c04a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC04A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85C 16408 bytes
SHA-256: 2bab5c827af710cbe43b162fd0752763caab639a407dde8289f34d67c9ca0f78
font_02_sfnt_off000102a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A2 10896 bytes
SHA-256: d96b51d2be8cb24ea59d69c20c15884a0c4b91d38596267b9a967a724809f2ac