Malicious PDF — malware analysis report

Static analysis result for SHA-256 64dd182249a91861…

MALICIOUS

PDF

81.9 KB Created: 2021-08-20 07:25:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1095650b9cc33de6ef3f1802e32d13f0 SHA-1: cd2c0a57b1dd1b77aaef0deb5acc291d700ab55a SHA-256: 64dd182249a91861ccc56e541aafffcacc0439e3d30d116c36b036886971876b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a lure or downloader. The presence of JavaScript indicates an attempt to execute code within the user's browser or PDF reader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pistant.ru/uplcv?utm_term=how+to+hard+reset+plantronics+backbeat+fit PDF link annotation
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a2e7194c1---xefinejiwukoxefesox.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/santgehjobjs48vkopu819dpeo/67351694332.pdfIn PDF document text
    • http://4bzsoftware.com/Images_upload/files/25943963657.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094643cac257---jususasa.pdfIn PDF document text
    • http://esistore.be/userfiles/file/putezenado.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e2f72c2f7e4---40397225402.pdfIn PDF document text
    • https://sanidom.pl/img/file/11563805095.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/f9b0b5f8c8a8ec9bb7293032f0837b24/75198910919.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/b4cc3c1ac2f414f276f0c4a634f489b8/zufukaraxewatilonifiditik.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/19782424132.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/1908a8cd0014b9b24e52bce351f1b6cb/6242480041.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/12899796787.pdfIn PDF document text
    • http://pagyesa.org/userfiles/file/20210608141714.pdfIn PDF document text
    • https://nistd.in/userfiles/file/5083527884.pdfIn PDF document text
    • http://48bulls.com/js/upload/files/14523276639.pdfIn PDF document text
    • http://gewald.ru/content/Files/kigazogupi.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/45434795210.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/31011241457.pdfIn PDF document text
    • http://aatmicscience.org/asuserfiles/file/rezozevi.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/14478257333.pdfIn PDF document text
    • http://chothuexehochiminh.com/userfiles/file/30809740672.pdfIn PDF document text
    • http://24hnbc.com/assets/ckfinder/core/connector/php/uploads/files/fibajubotajowuriwofepuwev.pdfIn PDF document text
    • http://nzmbc1611.com/clients/e/e6/e6eb4f38db7021b04b945082fca6026d/File/vawimejenezudupun.pdfIn PDF document text
    • http://xindeshiye.com/uploadfile/file///2021080114465066.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/e9387bda914e3bc22b20ee3440e23444/muluwokazitesawujetatuve.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_off0000db00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF312 17160 bytes
SHA-256: fd0823a19cc553a1f244341644f4cb450d63970c2ebf9800de39b78b5d3af4c8
font_02_sfnt_off0001202f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1202F 11028 bytes
SHA-256: 048cdfc2c4a47cee355dc02a11ebcd8e21b3d4257ecf98f15a9fddaa6ac6bede

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