Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e321c20898ad26b…

MALICIOUS

PDF

77.4 KB Created: 2021-09-15 09:49:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0d8ea88cb7762eb39d70be8fde0a845d SHA-1: 393d0a6395eef4aa559e06c1fb1bae28091bed52 SHA-256: 1e321c20898ad26b038ff911302bbf46c9f6a9bc9971fb385232cbb28e77f283
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious and exhibits characteristics of a phishing lure, specifically related to payment redirection or bank detail changes. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites used for hosting malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into divulging sensitive financial information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://garglob.ru/uplcv?utm_term=why+is+my+email+not+working+on+my+android PDF link annotation
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/mradfg5pc4qcfds52d4vq42q23/16935177547.pdfIn PDF document text
    • http://officinedesign.it/userfiles/files/3708883838.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/41612734776.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/07c3dc48e122d2c19f076908e2d24c9c/33873837339.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161416514bceb9---wemigorufulaw.pdfIn PDF document text
    • http://wingmanresearch.com/userfiles/files/zokedenuvuxedupo.pdfIn PDF document text
    • http://domuran.pl/files/file/1341314342.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210904115045.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132a86d9c9b8---lunututado.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/1211f190b7707b3711b047efbc01b92d/37371108998.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/jekifidi.pdfIn PDF document text
    • http://arcstema.com/userfiles/files/fupobupixumetemasenabu.pdfIn PDF document text
    • https://yenhuy.vn/upload/files/84002029149.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1614143879f2aa---givirelagivid.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/198625687038ca16b4287e6f581f9b9e/duvututotikukelitepeposij.pdfIn PDF document text
    • https://lexcochoralsoc.org/demo/lccs/beta/userfiles/files/busixovoguwaxubep.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/98153029970.pdfIn PDF document text
    • http://datong-travel.tw/upload/ckeditor/files/20210912160759.pdfIn PDF document text
    • http://ashole.hu/UserFiles/File/gogikoramopinulugofogexus.pdfIn PDF document text
    • http://enotecagaribaldi.it/userfiles/files/dubetajodan.pdfIn PDF document text
    • http://nabisori.com/userfiles/file/sibanerupazabopanizetotu.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/12023597520.pdfIn PDF document text
    • http://cjcounsel.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xefavoxemowinozog.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613a93125f001---penefesuk.pdfIn PDF document text
    • http://tuhocxuatnhapkhau.com/uploads/ckfinder/files/pimugolimomogujot.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_off0000c67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC67A 18480 bytes
SHA-256: 9cfac1b2068c3eaee90efd39f610f32735581f3e0fb3b7f78b51fd7b7de9b641
font_01_sfnt_off0000f699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF699 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010eb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB0 10980 bytes
SHA-256: 25a9ffe80a82858540bde456edcfc679f3f3d6873fb46c7e702835cce4bd7d23

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