Malicious PDF — malware analysis report

Static analysis result for SHA-256 514f32c56fb985b7…

MALICIOUS

PDF

85.7 KB Created: 2021-08-01 01:56:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: df8047352113bb2154c3595f383e22bd SHA-1: 6a0db07624d995e86375707055b872db4897932e SHA-256: 514f32c56fb985b7ff8c33a2b4dfae1050c2ff975ad4ac7484a9389297439dbf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a large number of embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users. The document body is heavily obfuscated and unreadable, but the presence of numerous external links indicates a likely phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://huntic.ru/uplcv?utm_term=how+many+kilos+is+6lbs PDF link annotation
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c4fa566cc---worekowalolutolokut.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/40fcf2077466de3be8d0803c03126508/77191985934.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/53721322872.pdfIn PDF document text
    • http://coreaad.com/DreamDataUpload/file/zoraxemes.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f98b8444208---surubefesudun.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075341d54df9---sikaduf.pdfIn PDF document text
    • http://rld-carbon.ru/file/mewuwefiturizis.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/61879145477.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/8f0336ccefde2b2b6129af2447814439/dawozukopexutar.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/8386c1588897a4b84d4f3b53264e682b/lujuxegojex.pdfIn PDF document text
    • http://mobilni-kadernictvi.cz/files/file/dunukedexerixevudeb.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/27758953151.pdfIn PDF document text
    • http://hzkontejnery.cz/ckfinder/userfiles/files/fosadewotululowebazatugeb.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/15999898286.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/wisiteladogobuxo.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/rawewofisu.pdfIn PDF document text
    • http://flemingfamilies.org/clients/8/8a/8af36a28baf44bfc7b8a7004fb4eaede/File/sutisobenogav.pdfIn PDF document text
    • http://pechati-piter.ru/userfiles/file/99293080322.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/wowutorelawoloxa.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae4796ba081---ximodululujabawumal.pdfIn PDF document text
    • http://jpsacademy.com/slbdavbatala/userfiles/file/25547093695.pdfIn PDF document text
    • https://shellserva.nl/docs/Image/file/6137615331.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160faea019e0e0---51314553898.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_off0000ea25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA25 18480 bytes
SHA-256: a364efa4d93d8145f2a86e16bd4d81d936fed24e89eabe8638451f4cef619ed2
font_01_sfnt_off000119b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C7 10528 bytes
SHA-256: bdde1e5c98d2419d074e9ab142cf3849a3b83f8287ae6ca60e265df5f2061078

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