Malicious PDF — malware analysis report

Static analysis result for SHA-256 80cfceb1bef47fd5…

MALICIOUS

PDF

70.0 KB Created: 2021-09-05 09:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e33004480da188cc2d524747ed892714 SHA-1: 06f8a570d7b73c6eb631b49e2078dcfbf60f8728 SHA-256: 80cfceb1bef47fd52b1f6e15a304993193a05642586b2fa052a9dcc64a8ec9c4
176 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing lure, being image-heavy with embedded links designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggest a link farm used to obscure the ultimate destination or distribute payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://otartufo.com/ckfinder/tartufofiles/files/xuleg.pdf In PDF document text
    • http://aep-tc.com/cache/fck_files/file/2724411304.pdfIn PDF document text
    • http://belovosushi.ru/files/13073554068.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/b9113b73003820fb7fbba86813e8e4af/56495874955.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/a0fa67a7e7481fc47ed4d8dedd6ad44b/mutimojuwosaki.pdfIn PDF document text
    • https://poojaindiangrill.com/nbloom/fckuploads/file/76066332649.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/8116663228.pdfIn PDF document text
    • http://mengnuanua.com/app/webroot/files/files/6714832684.pdfIn PDF document text
    • http://chinalabware.ru/d/files/bajagagu.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd4a8314f06---fosevefumutixisukiwovalad.pdfIn PDF document text
    • http://deltools.com/userfiles/file/99529788632.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/cc184e584c795215790f193b4e3f5c7d/pawebifituvol.pdfIn PDF document text
    • http://kmbb.at/userfiles/file/kifegam.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/02375g44tsmjcqhon8ns3keoh8/96700157262.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160fa1315603bc---dizuf.pdfIn PDF document text
    • http://quick-thailand.com/images/uploads/file/nunemadoxix.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acfd556343d---74135091368.pdfIn PDF document text
    • http://seoulgreeter.com/userData/board/file/13649107046.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/d47907e48f78348d9d1b738dfd6e58d0/gadoluvurejoporabuwevami.pdfIn PDF document text
    • http://ultraljud.nu/bild/files/dajekar.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c392bac26b3---27953603029.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/47t2aaa2pn5q7nhmevhs7i36c4/99426086229.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/limimugobuviwojafavoxeka.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/55880851.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/8e2e7208fa2d4e71841d1824c6c2d6d1/98184799630.pdfIn PDF document text
    • https://ibrahimkoc.com/images/Media/files/3125658786.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=logitech+g300s+optical+gaming+mouse+manualPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB631 13896 bytes
SHA-256: b7fe83758d8b20c0d009b7fb5f901a64e333804b4ef9f385b9bca4362384b0e9
font_01_sfnt_off0000d82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82F 11072 bytes
SHA-256: c097d8e7cc3e75e9f634028d51a531c3dde6353b3125b4e232ea049055af86e3
font_02_sfnt_off0000f1d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1