Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e0fd7382a35dd42…

MALICIOUS

PDF

104.9 KB Created: 2021-07-04 09:55:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3986c0b18bb1e8acde436f03e80595f6 SHA-1: d22908e37baf7b4ee1b4d10b24578ebc1583af4c SHA-256: 6e0fd7382a35dd423b2a682815ed28b655bc482ea80960076c530647fb8ad77e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm to distribute malicious content or conduct phishing. No scripts were extracted, and the document body was unreadable, but the heuristic findings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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 http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd25dd9c90---1649000940.pdf In PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160794a37a0c0c---papuxonefefupivum.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843f6d22a36---45978909969.pdfIn PDF document text
    • http://sskj.pl/userfiles/file/79822256311.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/1f9f9b1c1ae71d2043b88c8627690d5a/gapurinefuvan.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/c83c8b744513b9b75b88def98a19d9b6/64831686654.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/10147138627.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/bomokak.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/5cba1457be83705db5bccb76c2a3dfc1/1653867561.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/c028cff7c5f3c7516d191ad5ca2e02cb/15758584698.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a6872270f---marenirofezigivofegar.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/fakixozujaseninomo.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/f7739d741ba7c7e9fb4a1d7535f4ea6c/47929279564.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/surenetidetopil.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/43086810149.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f71be42db---degidave.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609609bb61013---89712275081.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/rg3ovdd381cmccti5gloadg0r0/80677763186.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/jivixinujadofugijudiriwud.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/simes.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/dusaw.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/xubapumufaxavizekapil.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b332a78c1---zesolowuxejutapifet.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/el1imju7cr5koqt9ndmkn6pg8p/varerorotujufaz.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/1f0e508449f15a60326acee6ee8fa51d/medisifudurazomi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=strength+reduction+in+compiler+designPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000120a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000138b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138B2 16236 bytes
SHA-256: da19bf6223b5696289af637a9e0a2a6a60d58f2ba808c9668240d62b5604e04f
font_02_sfnt_off00014e59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E59 17712 bytes
SHA-256: 424e083452a48b4d0176f98bde113773b002c47a6c35ee8ce3ddcc206b371706
font_03_sfnt_off00017cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CDF 10976 bytes
SHA-256: 343e4989a55215d777f70bb0bbc12f890a605cdcac6a5da8b4783d95e2dca541

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