Malicious PDF — malware analysis report

Static analysis result for SHA-256 e00b4120e19b200e…

MALICIOUS

PDF

68.6 KB Created: 2021-09-02 08:28:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: fc7a286a37496a8578cded34ae78ed05 SHA-1: 3476e7cf9287a69a62df5b89343e6dc4aa718d7f SHA-256: e00b4120e19b200efc2424b77a2de463779c88fdf383e551c19b508b5c5f3724
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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 68 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://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a41cb9a1b31---kilivon.pdf In PDF document text
    • http://annamsaigonlaw.com/upload/files/pikatosa.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7550457718---49359538220.pdfIn PDF document text
    • http://www.toeterloeh44.de/files/ziguxepitunulakixa.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/33293900867.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/dariwipaturo.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/31243774652.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/nakog.pdfIn PDF document text
    • http://bluekeydigital.com/images/pic/file/bivexurakiwu.pdfIn PDF document text
    • https://pasarantogeldua.com/contents//files/36996247056.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/57922511595.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/sipepejexabumudivukudubog.pdfIn PDF document text
    • http://mishelik.ru/userfiles/file/40893176051.pdfIn PDF document text
    • http://solar-makernavi.com/ckfinder/userfiles/files/10029399856.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ae37dcb8eac---85853980536.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/c778c556bac2175e1e11980479e7da39/62752302996.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/pozuv.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/35e8853a11b33066e1fa39a004b8561d/23172269990.pdfIn PDF document text
    • http://westhollywood.ilovepokebar.com/uploads/files/pagagujabotabuw.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c10eba33b5---71609185300.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a290abf17dd---92085294552.pdfIn PDF document text
    • http://prodottoitalia.eu/userfiles/files/53599584851.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b26bf2636---38387625231.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/gelolisov.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/qhlqdf9i8q8bm79bf43gm68397/13653912195.pdfIn PDF document text
    • http://philipwillettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tesikuzotitesuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=keto+diet+and+ricePDF 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_off0000b378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB378 14316 bytes
SHA-256: b34fd8c2bec5432acffe4bc9b1e19005a52fff4f0cda86ec37f9550d4336d797
font_01_sfnt_off0000d63b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE52 10140 bytes
SHA-256: 963d8b543b9523505620fdd7b8a74523d5d91fcc31664c8adf4e642fddbb0112