Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be6f62a0a93f9a0…

MALICIOUS

PDF

82.0 KB Created: 2021-08-18 06:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 843c06553258a596588b9341e846e020 SHA-1: 5b3ab57ccabc507fae2a8dbbdfe2fcaacda4f86c SHA-256: 1be6f62a0a93f9a0becde61d30f578f87ba75e81d38e4c0d7083921f565ec243
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs are likely used to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://oniceh.ru/uplcv?utm_term=kannalane+song+ringtone+free+download PDF link annotation
    • http://myconnect-thailand.com/image/upload/File/polumamaxaxezozedutiwukon.pdfIn PDF document text
    • http://equipociclistaugeraga.com/ciclistas/userfiles/file/pozupegigoxotij.pdfIn PDF document text
    • https://ipekyolumedya.com/resim_galeri/file/fudaboposidurisezak.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/3107a5f4d5c9426c5b5d8be333a74849/11352621539.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/rafedifukawuzaro.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c1220ddd728---14991666700.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/cnlh9plrqrs71errvje53c2rmm/mavigujere.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/49835509804.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/jttahsd7mnqvnhbs381v3vefjt/19427774964.pdfIn PDF document text
    • http://riverside-plaza.com/upload/userfile/files/70002684767.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160c157c761952---zofet.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/efe5adb3f5a8bb262ba7f521470ed697/11717854019.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fdea0857378---dadesibuzoware.pdfIn PDF document text
    • http://chinawin-consult.com/userfiles/segotisazidejerudiferow.pdfIn PDF document text
    • http://maplewoodmachine.com/clients/1/17/17f0ea2532424b9b8bf99baf53cd3763/File/setot.pdfIn PDF document text
    • http://tandprotheses.com/ckfinder/userfiles/files/1924714714.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160fe9dbd77daf---fupanikikaxejaxarefel.pdfIn PDF document text
    • http://northjerseyseniormenssoftballleague.com/clients/2/22/22e10641a135963e7b476298ec508c3c/File/dorimalojamufap.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/36081e4378cbdce29bf691821b5650e7/zidupomosuwapobuduxugejex.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/b89e5430237e32276458b2fb28490bed/vojibuzewagosiduripefulow.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/kavigowufejam.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a30dc2bbce9---38127050575.pdfIn PDF document text
    • http://ros-grad.ru/fck_editor_files/files/34287342684.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/9484518144.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/5dd2033sqqadr20enppsh5nrie/xuxuzujunoxu.pdfIn PDF document text
    • http://www.fotoliaIn 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_off0000dceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEB 10608 bytes
SHA-256: e82ca16e87de1aaaadc62ad085f686b62ad6e2f0a21920cd59c74714e436f782
font_01_sfnt_off0000f522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF522 16912 bytes
SHA-256: aab2e8e715410a8225d2bc24fda575418f4ea7e3c1687ebd8200bd803efb287b
font_02_sfnt_off00012172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12172 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1