Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bdfb68dadfb14da…

MALICIOUS

PDF

109.9 KB Created: 2021-06-20 22:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 3eaf9a22dbd5753199aee66cbb3ba6ae SHA-1: 5d514b17186055ada63cd1ec2e9963151d10d36b SHA-256: 0bdfb68dadfb14da2dbe8df94d9813be14d1fc871203d19edf5e97d6da8ad1d7
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

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://smidgel.ru/uplcv?utm_term=naruto+movie+the+last+dub PDF link annotation
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/m5603osvcqdk2b059mg8ls1mt7/20587969819.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/4a81e1c56b5837746bb1c130839afd49/20485918328.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ac220e108---83381558777.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/893665def771af8407d538132a9e7686/poxutafivo.pdfIn PDF document text
    • https://iwnta.com/userfiles/file/nigebelofapana.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/ibmpgp1n62dg9uvnooetotcnb0/xiraxovofedolife.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076dce675216---lemotimekuwak.pdfIn PDF document text
    • http://caratow.nl/userfiles/file/3931758503.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/42997516840.pdfIn PDF document text
    • https://maintogelonline.info/contents//files/21169899842.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/akgjbs5qu584si0es6esv1fr53/99105924164.pdfIn PDF document text
    • http://xoblates.com/clients/e/e0/e08cfb93fb97b00c28394d0532709dc9/File/55177751699.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/f63eb97240592a9b85f3958b823532ef/61011146398.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/1964085338609ddb1224a72.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071e86160cc6---fabudur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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_off0000fb28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB28 24664 bytes
SHA-256: 46f16cce4ec89a14b59d711927312e5c63314f2012fbc500643cb34243964c5c
font_01_sfnt_off000149a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149A6 5008 bytes
SHA-256: 985d2aeeffcdb1b312f2bcb37fe7e43c3566169ad1e518bce9fdd2a689f06a87
font_02_sfnt_off00015aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AAE 11748 bytes
SHA-256: 5d8d99fe434139827ed6f307cebfb85e9b9151f1a12dd6437899ac41f4512bcf
font_03_sfnt_off000181bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181BC 17112 bytes
SHA-256: 32e6e9f64ab709fe9cf35328b463d17dbcbe26f3fd6b72cf25a44e69ebf2fc60
font_04_sfnt_off00019a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A21 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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