Malicious PDF — malware analysis report

Static analysis result for SHA-256 599359576c4fefc4…

MALICIOUS

PDF

80.4 KB Created: 2021-09-02 17:15:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 74fb73e6b600c18d5460e399afcb8f97 SHA-1: b3125ca0d4e81d299820d8b025f01bd8ce64c797 SHA-256: 599359576c4fefc4b62543687c646840cbb5e9fa33984589e4ac90670c20f20a
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised websites and link farms, indicating an attempt to redirect users to malicious content. The PDF structure and embedded URLs suggest it is part of a phishing campaign or a distribution vector for further malware.

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://pistant.ru/uplcv?utm_term=enamoramiento+y+amor+alberoni+pdf PDF link annotation
    • http://fandimnarodaku.cz/upload/file/kesumewizotu.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/81192720961.pdfIn PDF document text
    • http://moscowprice.com/content/xuploadimages/file/kiraberejot.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612080e0d2a29---wixesabunito.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/abe117a91e901183e1e55b3095146264/bivojufelozobiledir.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/f7da3e8a29188b8e66c783330e0fc026/poweponijamezaxujaz.pdfIn PDF document text
    • http://terhautz.com/upload_files/files/45697091903.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1e30a4435c---43507701923.pdfIn PDF document text
    • http://marmaraisg.com/images_upload/files/jelasuvojul.pdfIn PDF document text
    • https://aslplastic.com/ckfinder/userfiles/files/nanab.pdfIn PDF document text
    • http://otohondamientay.com/upload/files/timaxizes.pdfIn PDF document text
    • https://euinsuti.ro/app/webroot/files/userfiles/files/98295432586.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16078224fcf0bd---bunamiv.pdfIn PDF document text
    • http://centrumbiznesurawicz.pl/userfiles/file/78794674228.pdfIn PDF document text
    • https://tomorrowhubs.com/upload/users/files/99317002534.pdfIn PDF document text
    • http://chineseclothingonline.net/File/4310329948.pdfIn PDF document text
    • http://01host.ru/userfiles/files/gozuvelokogof.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/66866169717.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160910c5fe83e8---93170994848.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/4763bebc728d2ef545dcc356c4519a08/81797593920.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084a02a4e175---pizumaxebugozuvin.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/82a0314cc9fbd211560ab1d28a10e0a1/xosutapenamevadusuxi.pdfIn PDF document text
    • http://kibbkw.com/uploads/files/mixovevatukazozusuxobasu.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/movixatowefemibelexule.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d52a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52A 18356 bytes
SHA-256: a7db13a0b4e6a5092e2e6fbcb0f4da88a14d57ce756685d55afcdbfff5d9c034
font_01_sfnt_off000103e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFC 10728 bytes
SHA-256: 56157558ed3c076aca76eca39eec3248a5f6b3b20ae4a8d03ede61fd9f73703c

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