Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b6452a89496a6e0…

MALICIOUS

PDF

110.9 KB Created: 2021-08-23 12:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 180f8c590a85e5613ccbe59906b61f7a SHA-1: 58149acabbe33c7aaa88761635db7b1174c3ab9a SHA-256: 8b6452a89496a6e066f6bac633c347dbd378a8c57e2d6b9b76384f20aa8244f0
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm or phishing lure. The presence of external URIs and compromised CMS upload links further supports the attack pattern of directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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=mastering+astral+projection+pdf+download PDF link annotation
    • http://gelikonline.ru/content/Files/jojisiguribaxigowusiku.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/sotawu.pdfIn PDF document text
    • http://mentaplywood.com/images_upload/files/27910804433.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/17069178916.pdfIn PDF document text
    • http://haciogullari.com/depo/sayfaresim/file/nuzedogaxapezawixuluze.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160827c301a81e---3748201159.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c2035c94e---naxakexo.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/1f128c272a90464155190597348240c1/matitalexunagetaz.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16098587eeb7cd---71964699162.pdfIn PDF document text
    • http://koreaseals.com/ckfinder/userfiles/files/muvufobufakuradaxibom.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/57749375857.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16083c3f90e7f0---zoxetamuvaperovaraxubep.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092a30ff1414---87061152301.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/gefisefakedef.pdfIn PDF document text
    • https://cupanghitam.com/contents//files/8749679.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/5180850097.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/4ffc2eb760f4afb353e209c61cf10f74/55813605757.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/79943945618.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/c3b21e7c6e00e7ef6acd06b5b3b47fdb/50209197063.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/32609df67d16d975b985e866dd78bd31/83044447220.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/032r8mg8mhshb05i7j6jsbcof1/lezesabaxop.pdfIn PDF document text
    • https://spa-salon.ru/ckfinder/userfiles/files/18458122441.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/q3e8aeucj5gaectg166td5n5b7/vevaruziwusome.pdfIn PDF document text
    • https://landi-bg.com/images/file/saxaw.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_off00014b38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B38 11004 bytes
SHA-256: 56e38faeb37f2faf25941e85ce188cebea180ecdf7421f05d72b55a85c00d0b9
font_01_sfnt_off000164bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CCF 18824 bytes
SHA-256: e362cc23b1ef8eeb000d99df7e0d06066fa3af9024538e9f42d37a2a4901c02f

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