Malicious PDF — malware analysis report

Static analysis result for SHA-256 59ef04b832aff0be…

MALICIOUS

PDF

82.0 KB Created: 2021-09-02 21:11:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d88ead1dbc6d30d74fed5dc32eeb5ba4 SHA-1: 1d57b7d3e7311d4c389ce104a87f7158ceabbfb5 SHA-256: 59ef04b832aff0be0a2f181b03129cc74af138229c3e515b28b824821a65a208
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics indicate a tactic to obscure malicious links within a seemingly legitimate context. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly suggest malicious intent, likely involving the download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb3aef3521---14557763326.pdf In PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/vukurotemozu.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160f14af770399---98921484030.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607488a0ea3a1---zolodaxisetijerojixedak.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/1e7f75f99d15a8d497da2935eb00a1af/25866317092.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a23ebeed41b---saganadugimafa.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcfc7a6b8b---5739349925.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/0e0740415408b09b2a4fde04ab6086c5/73780064309.pdfIn PDF document text
    • http://www.ettermanenterprises.com/ckfinder/userfiles/files/mirerexukexozesipunejerij.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/duworugatikisowojizi.pdfIn PDF document text
    • http://dztechfin.com/upload/file///74431270798.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160acb1edde1e7---niwaredopidozukunolifew.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/75377416584.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/57809649576.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5f2c49ddc---59148790067.pdfIn PDF document text
    • http://ros.by/ckfinder/userfiles/files/pugujiwuxesi.pdfIn PDF document text
    • https://sistemagestiondpr.com/userfiles/file/91235442984.pdfIn PDF document text
    • http://kozszemle.hu/uploads/files/bebipivunulubu.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///nanawusowetubewufigor.pdfIn PDF document text
    • https://www.vpn-solutions.com.pe/ckfinder/userfiles/files/kumusapudenuvexafiwum.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/nuvabimubedumitinak.pdfIn PDF document text
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/bemedopivigi.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607486cf461b1---98004210138.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=logical+interview+questions+and+answers+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADE 11148 bytes
SHA-256: abbd891f00e9f76f8412cb4e5859f5406140931237452e613b85132adf828684
font_01_sfnt_off0000f490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF490 17972 bytes
SHA-256: b36c5c3e90cac325d70f955cd37d6b80fad06d7e5ac364af4ca885deb47d8470
font_02_sfnt_off0001228b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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