Malicious PDF — malware analysis report

Static analysis result for SHA-256 baa0e632447b6035…

MALICIOUS

PDF

92.9 KB Created: 2021-08-14 03:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a9abbe61ef8d9986d03a727daed531c8 SHA-1: b6c0573d69e38db289a7b3c0a9d6c87f4c30f217 SHA-256: baa0e632447b603506dc2a9f944c9074007129321f9f4caecea603c398088d8c
156 Risk Score

Malware Insights

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

The PDF contains numerous external URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

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://garglob.ru/uplcv?utm_term=solomon+asch+conformity+experiment+summary PDF link annotation
    • http://bienbao.net/uploads/files/zakubikuligoramoz.pdfIn PDF document text
    • https://itacademyindia.com/ckfinder/userfiles/files/kijakovove.pdfIn PDF document text
    • https://altinhediyeler.com/calisma2/files/uploads/43871183642.pdfIn PDF document text
    • http://msamerica.net/clients/873634/File/53157839107.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1ffe3cff2---nagodefilokugipad.pdfIn PDF document text
    • https://podiummagazinenews.com/ckfinder/userfiles/files/57681721248.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16087235a7c18b---fogesimetufimebaxixavini.pdfIn PDF document text
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/89310129691.pdfIn PDF document text
    • https://go2germany.ru/files/file/326160716.pdfIn PDF document text
    • http://0965818789.com/CKEdit/upload/files/gewefag.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/foposedazavalupebuver.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e36049a0dc3aea8110bcdef0e6d3a3b4/japomotewibabexotogoja.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/usoc7pa5d5btlj1qlkp8tbn5b7/86925915912.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/242774b2bb8f8aaecd8d002f888fae3b/vavebidokewuvagake.pdfIn PDF document text
    • http://bhs-class1957.com/clients/35434/File/21914414640.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a07d8362f76---radakikifofuxopenuxubola.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f27e4e023a---38783976003.pdfIn PDF document text
    • http://xn----ctbguteehkho5h.xn--p1ai/ckfinder/userfiles/files/94741078717.pdfIn PDF document text
    • http://cungcapluonech.com/upload/files/duxapas.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/4f1e4ad06b92bb8c515729c73a6df23a/zukopofilig.pdfIn PDF document text
    • http://www.cddfct.com/up_files/file/10679734124.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608941f957ca2---nuwugakukisunofejabix.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/nihp5iltuh2t67ne8vfopm90cg/dunanavijunige.pdfIn PDF document text
    • https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/b8bc5372f8e24f4b0a13ca8765533b7f/lalekobilizov.pdfIn PDF document text
    • https://baongochoa.com/upload/file/57298996784.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/cd61a39be11c36a89cd462a8571b4186/50972245636.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/318794e195a3f4f48a1cbc9d48cb6844/morewotiraf.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/58f297ca40c7dee9447fb945cb43a35d/68902025307.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_off00010487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10487 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9E 11136 bytes
SHA-256: 7e85fe665fa54757f369e3a9d47cee2529994d432a34d000106358b253c86488
font_02_sfnt_off0001366f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1366F 16864 bytes
SHA-256: 8b022aebb7d233c4f172599ba4415fd86c72b20f0e02200e93ad00be2da1d9b3

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