Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e092a20fe2943f…

MALICIOUS

PDF

86.4 KB Created: 2021-09-07 18:21:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 220103f9d929fe54b9e43f1e251c6efb SHA-1: 7616e2bbc014fed09dc2d61c44613b883c3570de SHA-256: 45e092a20fe2943fba1cac7c77e5722c85959742149958e3e5082abc9d47f349
176 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm hosted on compromised or disposable domains. The 'SE_ENABLE_LURE' heuristic indicates the document likely instructs the user to enable content, a common tactic for malware droppers to bypass security measures. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it is designed to redirect users to malicious content or download further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://derkwoo.com/upload/editor/files/50188211688.pdf In PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/700566632bf33160aa9bd3d2dd6ea6c3/fomolekufi.pdfIn PDF document text
    • https://pmcp-avac.com/files/upload-ckfinder/files/jusalaxisemisuti.pdfIn PDF document text
    • https://datawire.gr/files/files/44245693451.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/hosdo7jkdgti4kei8jibmsdab9/xediteposev.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a641ef130---vupamuzawakamawamizit.pdfIn PDF document text
    • https://dolcezzecaffe.it/file/59557396837.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/kigog.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1610d2316cf934---bosedokawodeduw.pdfIn PDF document text
    • https://10glazsikeyrosa.ru/file/29070199849.pdfIn PDF document text
    • https://botorka.ro/userfiles/file/sinetibavoxuze.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/93290326864.pdfIn PDF document text
    • http://cppzone.ru/users/blogs/file/84589716873.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/93eaac3354981bec6787cb99b9016eea/pidodifigogajinemefe.pdfIn PDF document text
    • https://sealskinz.ru/files/file/remuratojejevifapuvosumum.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/d54a06636756c9b4b7e8328af6fc663b/desavofalad.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/hoohrdc2v97djk2gflucdmgopt/juzelipaganojujivej.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/mlfca42059aiok99d7qr7rkodv/zejavopisabiduru.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160faee680ab80---49459932546.pdfIn PDF document text
    • http://awfiowv.love-mrt.com/upload/files/37574756621.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4107bbb66---58193452386.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/76dd7d27d4229da4b306221ba0b1b6b5/26583230849.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/tuvosofese.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/betasima.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/pavejerixozinakodumen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=prime+factorization+puzzle+pdfPDF 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

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_off0000ea01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA01 18568 bytes
SHA-256: 389bbf5ce8946c5981a8be5ced572e32eb108757d9a04f1aa877d171720f0a38
font_01_sfnt_off00011a8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000132a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132A2 10776 bytes
SHA-256: 6d654d8dd0d1e83b626eaeadf412ffcd27a2e5d94ee22cb7a9e99440f9cc570d

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