Malicious PDF — malware analysis report

Static analysis result for SHA-256 7df1ee2683bbce60…

MALICIOUS

PDF

84.9 KB Created: 2021-07-18 16:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: aa7eb82db3ce7951451d44ea9adbf446 SHA-1: 98ab1252a2386d7e9a9eb04318244eeee42a47e9 SHA-256: 7df1ee2683bbce603ba436c6b7268e44aabdf72e6074dfaa68634c6376643033
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the file functions as a link farm, with numerous external URIs pointing to compromised CMS upload storage and disposable hosting. This suggests the primary purpose is to redirect users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/a48b3899ecdbb29aa43ec45669c58e8b/jatutamibirejukajix.pdf In PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/0d3e445e30d4384ebd24c17d33a4798e/62372848355.pdfIn PDF document text
    • http://bjjiffy.com/upload/45299617218.pdfIn PDF document text
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/43524416631.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/c18f6f2cf391d69ebfeb388dd70379ad/wafegamopitu.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/8a2siqfhmapt2bcmer0h2ohnip/zamesojopegov.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/52989597380.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb8da39322---46504910904.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d358059ab1---24727215340.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/99822299842.pdfIn PDF document text
    • https://jeneifogaszat.hu/cikkdata/files/vivuvag.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/k45slq13njeb85m08hb2thkdaq/39477948978.pdfIn PDF document text
    • http://eska-lift.ru/userfiles/file/polanesepojelodovaxurege.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/95123402275.pdfIn PDF document text
    • http://aczelzalog.hu/tmp/muxepigagemiten.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/e81102cb8e2f71d0ded45b312bedd3cb/4429833545.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16072c0bfd0128---lusosomadetolexuloxodef.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16078f4315d0c9---89270416759.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/e6bfb00c10944ffefe34a254ccaa83ae/28765576402.pdfIn PDF document text
    • http://sjhtractor.com/d/files/nepulozisinorikezosevan.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/59340733181.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac796e441dc---15229528400.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/kpj211r762v0d3o9a4dmvkv2oe/86036296686.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=data+processing+and+analysis+pdfPDF 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_off0000e8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B4 10912 bytes
SHA-256: b34e47c5ac225cbed4d11564bdd4f50f26a3c89307db9fa5207eaab8ac925fc4
font_01_sfnt_off000101e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E1 16972 bytes
SHA-256: 1eb9807ae4507435053a1888e349a42f0193886a1b7d81a6bb71db8d9a8f117b
font_02_sfnt_off00012e1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1