Malicious PDF — malware analysis report

Static analysis result for SHA-256 12eb36e6b5c4ddae…

MALICIOUS

PDF

98.4 KB Created: 2021-06-29 02:56:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 126372eb100f2c79c3d0482c9cb2bb13 SHA-1: 8cf3c670694a36bfd1ebe93069796cd83ae2b56d SHA-256: 12eb36e6b5c4ddae5360265459c2a00038d4149bff9328034393092f11a9ae3b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous external URIs, many of which point to compromised WordPress upload directories, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious websites, likely for phishing or malware distribution. No scripts were extracted from this sample, but the structure and URL patterns are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

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://nomylo.ru/uplcv?utm_term=exponential+to+log+form+calculator PDF link annotation
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/a7771d94289da8f6db454bb6b52b52f9/57358405362.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/u3epvam58tc6triamj5l51nfo3/murupiruj.pdfIn PDF document text
    • https://stijsr.com/userfiles/file/18244209632.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/99240246342.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071ecd294233---kakitem.pdfIn PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/molezekibudalidubolutij.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/kojikuja.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/288bb19fb377dfc3fd7b996d71e9b047/ziwuxiketesurebunuf.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a16ca5d4b19---43488584230.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e26a7c5007---9508716257.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/16242689812.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/aa3777f148cbf1494c87410fed3617dd/30946849326.pdfIn PDF document text
    • http://tano-cable.com/d/files/pefoxitefim.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608e482bae402---ganetaxoxalunuzu.pdfIn PDF document text
    • http://sarlampa.ru/upload_picture/xiboxizive.pdfIn PDF document text
    • http://aiskreunion.com/clients/b/b4/b417c2091670ce0b0d78f4b231aea02c/File/ziwedaxedujuripi.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/qhlkhnbpq1d91ir1c4alm02pkl/14136710044.pdfIn PDF document text
    • https://ratco-hardware.com/Ups/files/miburini.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/fbe4b1bf2ff4c372e877bf2fc6da406f/3824285330.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/15d9fbfb0197efa4431a37f7b3610b35/33364671625.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/9017826d81112161eacfada7f66f865f/bowimoxevojefig.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160915dbd61ab3---bukefaximega.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021062313492695.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10503 16220 bytes
SHA-256: 7705e8117d5d2452db1e193887883f54aa0270467b23baff83cb01dc72b8e3a3
font_01_sfnt_off00011acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACD 18244 bytes
SHA-256: 4782477a21c14004b0dfcbe9b8e08a34411c0f56f3a5fe838d62016c1ad6f533
font_02_sfnt_off00014ab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AB4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000162cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162CB 10840 bytes
SHA-256: 9916f6c475f14a3748ae1973b44f6a7188cd95ab83984a1a6c9e0723fea7f927

Open this report in the interactive analyzer, or submit your own file for analysis.