Malicious PDF — malware analysis report

Static analysis result for SHA-256 752c8fabd6555e9b…

MALICIOUS

PDF

85.3 KB Created: 2021-06-27 04:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8c78ce49ebab527d488993d86238a8ae SHA-1: 8ef4146dbde817c486f488c1a90871f205e83dac SHA-256: 752c8fabd6555e9b9d624997d58ef45a6dd83b39424ab4678572acf97f9b1766
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites, suggesting a phishing or credential harvesting attempt. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly indicates the document's purpose is to trick users into believing there are changes to payment instructions. While no scripts were explicitly extracted, the presence of external links and the nature of the heuristics point towards a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://krisoc.ru/uplcv?utm_term=can+you+transfer+notes+from+iphone+to+android PDF link annotation
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b10653168f8---modagixu.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609164a361132---99779621740.pdfIn PDF document text
    • https://giustofiori.it/file/wisovalemusezavefofazu.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160786c2094a3e---lifuseselonosisilap.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/kanedezasumobosafojotupa.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/9974963650.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcddea08919---kubosixo.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/23458302709.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/a921f26b7019229acb1e0294008365bf/29723399118.pdfIn PDF document text
    • http://mospolytech.ru/storage//files/jutifupagoziraxomo.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a315e7d2a65---3757744199.pdfIn PDF document text
    • https://combrooncom.com/contents//files/vasilidas.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077151982732---69572658047.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/85e9bpi9aq6n8i1uoqru7jcba5/50385868577.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/muut4kkagjttaijbesiif72imp/pigusewomazev.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/eac6347c4a55282c48fe6f49dcdec8ee/nofesuwozasudu.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/cf3807fed62d947b5cdb2c4727267ca2/jififi.pdfIn PDF document text
    • http://coumert.com/images/file/42469984467.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/d8d5907af6e0811922395960261945ae/nawamofikixaxin.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/2e4811ab59cee92c6e2c271b08eed084/lizawapegari.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/97280764226.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/4c59407b40659ea74c5673358f51badb/95090592574.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/geg6blr648lpboe7m8l1ko31d2/42787921925.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/ziwimolakinarabunuzu.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021061601304552.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/fle63hlioupllgs8tfjmfs540q/batuwiviriwagabopizunexi.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_off0000e841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE841 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10058 10964 bytes
SHA-256: 478eac91d5c0695e72311fe3074fc002c9606c9da4670aa289005465bece217b
font_02_sfnt_off000119a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A8 16960 bytes
SHA-256: 7df6e47db7959aff05b707ad2e92c1a15bef0cabb522a101fdf92a0280d0c7ab