Malicious PDF — malware analysis report

Static analysis result for SHA-256 033492e0f37e93e9…

MALICIOUS

PDF

99.9 KB Created: 2021-06-15 21:45:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c36eb9dda14bc929b0ce0198725239d0 SHA-1: 8d9ceb1c52f1fea629167ccd1f2a5fabf848bd7e SHA-256: 033492e0f37e93e96d386dc0dfb8f56b01454e0e5f8bd8af3c3e0655fff3d2c3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed for phishing or malware distribution. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports its malicious nature. While no scripts were explicitly extracted, the structure and URL patterns are indicative of a phishing lure, likely attempting to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://synerhu.ru/uplcv?utm_term=camp+rock+3+full+movie+free PDF link annotation
    • http://absolutelyneon.com/userfiles/file/rijojozor.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/331fbb6158e48f12bc8ac5baf35f02ff/24765617652.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/fofibuvositaso.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/47520306134.pdfIn PDF document text
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/d8bc5ba7633f9a9b89f4d9ba5dfdeb34/linanilatisebutipebiwe.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/928925fa4c177735316b58f24149f3f3/siwotaxunosasujome.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e62d448efd---juvinolipepi.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16085beadb1da9---vunat.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e2e4c1d8c---miwovajizorevege.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/1b280f0bc1e1955fc2ee40a229d15e69/jowej.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b741ade1ed1---50736201275.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/24d47b7fcd01c582ef27be3d831c53d6/lekelukivol.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4cbf65e33e---25174471715.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2c3b3dc14---85891624702.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11029 3980 bytes
SHA-256: c89f2e924ab529a5d4dcfef7d84a035ef2eadcdb4797dec6b50b73a43787584f
font_01_sfnt_off00011e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E11 5176 bytes
SHA-256: 86f75a9c9b76cd8c8bd062f0c82b3c331d9d7c9ed2cadc352adbc58ddf008567
font_02_sfnt_off00012fa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA8 15476 bytes
SHA-256: a89979dfbeabca958e1fd0509bcaf69d1f2de6c5c53ce6fcd23d721e14d01ae9
font_03_sfnt_off00015ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EBE 16204 bytes
SHA-256: 581c0268a3cc9df95828ceb030693f64bcb03969c1cab585f80954d7fb3b146d
font_04_sfnt_off0001744a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1744A 3432 bytes
SHA-256: d4afc002687d8139b5d8f64438173c1f9d5fe4aeb3a6d263b487de4716daeaeb

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