Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f88cc14c096a9c…

MALICIOUS

PDF

79.5 KB Created: 2021-09-01 14:18:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f2226e3d703d3f33323ff09875a6b498 SHA-1: efa3d66218c837509ea9ff9b8970bb3e3d1b9776 SHA-256: 30f88cc14c096a9cc363288eea37d4db01bb3843e2bc466f76b83ebe7baf99ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm pointing to compromised WordPress upload directories, suggesting an attempt to distribute malicious content or phish users. While no scripts were explicitly extracted, the nature of the links and the detection suggest it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://oniceh.ru/uplcv?utm_term=spare+no+pains+meaning PDF link annotation
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/aacada7e3d56042eb900154eb7006aff/67051814128.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/9qs9fmatqeeqllr36a82bpqsk9/51285254461.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16081d82940097---39258286044.pdfIn PDF document text
    • http://drthchowdary.net/userfiles/file/87984194757.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/zadofariwa.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/4086594463.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/54920656146.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/f42907b37938ce27e05433478edd5248/zosunoleguxekizef.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/52b2c44d20b4c0124667fbec393d0bf1/90407865589.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091b6c1dff29---47565782923.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/65d3a12981f0aa9e86e03103b6150178/74120265260.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f27cef35fbc---xoxezalenelojax.pdfIn PDF document text
    • http://shopcloud.cloud//ckfinder/userfiles/files/fogelaxararidatofuzawabi.pdfIn PDF document text
    • https://espritgt.com/userfiles/file/37848264038.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a172bd5c51---89342033716.pdfIn PDF document text
    • http://goldartline.ua/userfiles/file/gilagusorapu.pdfIn PDF document text
    • http://sapaelitehotel.com/webroot/img/files/22843893094.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/03d31eb6e78f3a175ebb2b0e876beccf/tozabizokej.pdfIn PDF document text
    • http://roocenter.ru/upload/file/53932932869.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/36628475579.pdfIn PDF document text
    • http://top1np.com/ckfinder/userfiles/files/68876525574.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ht13j3ida8io0vv10d5ui1b4m0/rumig.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/zebabejesenokugojogepoxom.pdfIn PDF document text
    • http://www.dkmodels.net/ckfinder/userfiles/files/megubeliroxubozuworan.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_off0000d2b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B4 10524 bytes
SHA-256: f4e123104169f6a40cb09f5d3c20ddc0243a46c7cafb9bfd93dfaf05f9b7dd89
font_01_sfnt_off0000ea9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AC 17376 bytes
SHA-256: 535fe968c2b51db1819b1840ef1bfdf0c6eab9a338f2810b351ef18061c40d5b

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