Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7601cacebf18af…

MALICIOUS

PDF

82.0 KB Created: 2021-06-25 16:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: e09d91cdf272dbe3c64bd491e1479030 SHA-1: 5db6b22e708c8f1046ba4e001d6c54cec0055a3c SHA-256: 0e7601cacebf18af3f56123872d3732f45faf99200e1a0f05edabf3e5a62c7d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links pointing to compromised WordPress sites and disposable hosting, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is heavily obfuscated and does not provide direct clues to the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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=the+energy+of+the+sun+is+produced+in+its PDF link annotation
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/ab2dd20ccc7acd5da1133a182688bf14/58291167485.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/cj54bh2u8v60abfgajrqc8go7h/zefamarovoxebexitule.pdfIn PDF document text
    • http://hiddenforrest.net/clients/76790/File/7175823879.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4d9476bff---gakovixujelof.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/071354496723.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087edc91a4da---mexavesejosavonakaki.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/zivazuzijafobinalo.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3afccfc1d---77999730207.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/tuginevijasixujevulega.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/silub.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/kupuzasebogijatovag.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/69445494649.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/sarawakuxuvejani.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/bafoposisagomori.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6859804076---buwilesezesojafufi.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_off0000de3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3C 16804 bytes
SHA-256: 67f113554f36d8e2089fd92c0dba61a6b1b039b46f5a7dafcdebca2c2059ae72
font_01_sfnt_off00010a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3B 10868 bytes
SHA-256: 85cecd97b9e779cc0e9bd7577fe5096c8e756d147638ba1c1e0a22a2eab27dca
font_02_sfnt_off00012322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12322 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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