Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eecb0fad898c00c…

MALICIOUS

PDF

86.7 KB Created: 2021-09-08 19:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 49d2c5c11438c2a591246bbfb5958654 SHA-1: 0ad21eed182b6c6561401c4951f73845e107da97 SHA-256: 3eecb0fad898c00c0326bb8439354cf20df18e2e14d429031aa6117a3a1d9dcf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by multiple heuristics and an ML classifier. It contains numerous external URIs, including links to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://drafthe.ru/uplcv?utm_term=nordische+g%C3%B6tter+und+heldensagen+pdf PDF link annotation
    • http://ortopediaszombathely.hu/editor_up/vexoripo.pdfIn PDF document text
    • http://gildiamasterov.ru/userfiles/file/1170179797.pdfIn PDF document text
    • https://harshahometutors.com/uniformkontakt/userfiles/image/files/54875876679.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161365c20dcf30---68425001083.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/refapetatoze.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/5ub16v479l2gbvcrdo3un0s73o/18003186617.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/mujozegujejikitusazefow.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/mavudo.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161311680b2dab---zuwajefazojufazil.pdfIn PDF document text
    • https://pensiuneaselina.ro/userfiles/file/wabunixifudo.pdfIn PDF document text
    • http://xn--nellieskche-0hb.de/userfiles/file/nimamalazavovinowum.pdfIn PDF document text
    • http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/dowijekaxubiwuwoji.pdfIn PDF document text
    • http://www.larucheapain.fr/ljk/file/kuxijufamoni.pdfIn PDF document text
    • https://yourdentist.ro/app/webroot/files/userfiles/files/dekifipifilisanifowogezef.pdfIn PDF document text
    • https://digireg.nu/upload/67417286256.pdfIn PDF document text
    • http://phoiinnhiet.com/images/uploads/files/vapokuxudipiwuzifam.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/21082685187.pdfIn PDF document text
    • https://hoongnau.com/upload/files/pivuwolijememaguwitinur.pdfIn PDF document text
    • http://inimtrento.it/userfiles/files/74731844813.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/jn1l213459ktpi03g3qu44v676/movofukajufunovo.pdfIn PDF document text
    • http://massiimo.com/piceditor/file/poximutejavewebonepelam.pdfIn PDF document text
    • http://pacemakerpressintl.com/uploads/assets/file/rimafomo.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_off0000e36d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7F 21368 bytes
SHA-256: 95ab009fc653195320ef082aa2dad6b91549d0143d6c5f39e8dab0a1749ff987
font_02_sfnt_off00013174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13174 11192 bytes
SHA-256: 65c2c5ecec17bb916eef6feb4aebe9b624db94db2bbb261cc512dbc4f05de563