Malicious PDF — malware analysis report

Static analysis result for SHA-256 e67a167c3a7b9f4f…

MALICIOUS

PDF

80.2 KB Created: 2021-08-13 01:29:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 292960d34379702272563b83075a149d SHA-1: 962a554dcfc0d88685753f2ba8427bb445d510f4 SHA-256: e67a167c3a7b9f4fa68e1584e7582c94a467604b256f22dc230bfe5736b86d91
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document functions as a phishing lure, indicated by its image-only nature and embedded links to external sites. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document instructs users to open a password-protected archive, a common tactic to bypass gateway security. The numerous external URLs, many hosted on compromised WordPress sites, likely serve as download locations for malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 80 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://catamma.ru/uplcv?utm_term=ulead+video+studio+10+with+serial+key PDF link annotation
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c136d4389e8---32628074809.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/38591100049.pdfIn PDF document text
    • https://elsa-daulte.com/ckfinder/userfiles/files/larikeparaduzogivop.pdfIn PDF document text
    • https://drosamahetta.com/userfiles/file/2925720631.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/a075b90d11ed68011499f6ce6536d443/wowigolaraf.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092a17d594af---98016832695.pdfIn PDF document text
    • http://jghsclass75.com/clients/f/f3/f322050927ea28328664fd088939ffaa/File/55370166779.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/93610749068.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d75f206462---61266150239.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/wevukojiges.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/loluzazizij.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/1242f7d2610875c93bc229d851b38871/sanigowafobalugek.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/lawugugarudavomoliruwegux.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/goted.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940713b7844---45472373478.pdfIn PDF document text
    • http://blueyee.com/upload/file/08050537233.pdfIn PDF document text
    • http://sheeld.org/clients/d/d0/d021426cee8527c21a172be12ef3d645/File/xokuledovetowewe.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c673c412f---nemunafakilaxuzupudovil.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740b43349c3---85043923468.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/0ou4tau70d4vc80mt8nhfjn065/12927049491.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/vqv5gu6plubkjg7cv213lodt75/98390544281.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/99593161677.pdfIn PDF document text
    • https://bilegt.mn/userfiles/files/negebavopadilo.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/05/files/210530154726.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/19002329790.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/kurebodupuripokufuxifela.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_off0000e141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE141 13280 bytes
SHA-256: c5ba2004bd3a623663df6b4a6988783fd461ac816a70b89bf12f7adb79134ec7
font_01_sfnt_off0001018c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A3 10880 bytes
SHA-256: 9770f90aed94eb17847756c32b45bffce751e7b9f7de061ca901d48756323fbf

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