Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7de06b0f8c724a6…

MALICIOUS

PDF

83.3 KB Created: 2021-09-07 03:07:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7ef7568dfac9ebee0a0b99356ffeef94 SHA-1: 6857eba9fade77a12a357e17b3d31b0eaeda8e91 SHA-256: e7de06b0f8c724a6c5f83fa56ae439d6fca52841751c63ad1aff00cf30b25462
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://hglobaltourb2c.com/FileData/ckfinder/files/20210613_9B3BBBDD02DAC4AD.pdf In PDF document text
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/rotutesiwu.pdfIn PDF document text
    • http://dzirerealtors.com/uploads/65123329888.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609878fd4414f---dojumoledarobe.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/5rcgvshen2dn4lk67fdhlr7o27/xezejizerevigedamoboxu.pdfIn PDF document text
    • http://byty-pardubice.eu/UserFiles/File/jomudiluf.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/teluk.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/98613890421.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/42761373631.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/n7pdr4stohcqj5jpqaa8c0f2eg/59281311687.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/10055391446.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071571c44c2b---golunetivudokepofagizeri.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/38603571891.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/b904b6ef5e23ccabb062e968984508a9/jovuzazunupuvaza.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/fuwexufep.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608db931d647e---82275757108.pdfIn PDF document text
    • http://cartopack.com/Images/file/69622490790.pdfIn PDF document text
    • http://benrassam.com/uploads/files/70010648533.pdfIn PDF document text
    • https://careersourceokaloosawalton.com/files/public/garepupilorogiz.pdfIn PDF document text
    • https://silky.ae/images/bulk_images/files/38748885785.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/32309403382.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/8nv5eh5dfa8pv6vtffc1169h65/jedimux.pdfIn PDF document text
    • http://hanlacsclub.com/ckupload/files/38541615673.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/2290005119.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/6a5e986bc5335ec669267142debec9d0/basafejawexopedujijepif.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/74335139187.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=demonstration+speech+examples+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CC 10988 bytes
SHA-256: e5ce9526e182f2b6e7bf3f9bb6d21509a09c2d40e31e0fc967c04307a0e12d9c
font_02_sfnt_off0001121e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1121E 17604 bytes
SHA-256: 3f4e6b1faf3b9223795314c17b9457fe0bab9c323c3b497cf2208974e48fec73

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