Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cf3c282130f70d2…

MALICIOUS

PDF

89.0 KB Created: 2021-08-30 15:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9e5ffb64ace7c549d4a7d0b5269ad62f SHA-1: fdf2497be5fc76108a2aedba36cc648c385d2f74 SHA-256: 2cf3c282130f70d22938574e46cff9ac2c39165dfae18bd7e17686e60d7894da
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and ClamAV as malicious. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be luring users to external sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://crewmak.ru/uplcv?utm_term=mountain+west+standings PDF link annotation
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161116c058a781---zozevujuriniserejoz.pdfIn PDF document text
    • https://monyetmesum.com/contents//files/27976939025.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/a119c44bf23f86bd297745bc26d8340c/rasavurisabagofejuvuti.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b640756947f---lowinodeparawutexojuduvo.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d7e42ab82a---vugelosobujosotewiga.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/0bd3eec3dea30bc2892c737fcb9ef1b9/sivanitumizunajuma.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/1da16eda650f51a0a2c3e5c15b1c2e64/sigoxomowikakogedidiparem.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/90768328054.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/lavenodenasisevogav.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16111879c821a8---jefixezilasasalunudejit.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/16190547829.pdfIn PDF document text
    • http://hdurmuslar.com/images_upload/files/dolurezakokifunawamupaxa.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/33589719835.pdfIn PDF document text
    • http://nonstopsushi.com/uploads/files/61943341371.pdfIn PDF document text
    • https://realxenon.ru/uploads/files/kikukidipeluxusasu.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f674d0751a1---39663240984.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/ad9027bc97c0e9a229600c8c120a348f/93529211187.pdfIn PDF document text
    • https://foulardfotografando.it/file/lovexaxitajorixeximozu.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608106e6d3ef7---55970455153.pdfIn PDF document text
    • http://suankaew.net/upload/userfile/files/77135314961.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a10ebf36a0e---wiwuxawogupadurun.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/zekivaxifiraz.pdfIn PDF document text
    • http://exima.kr/userData/board/file/41153958404.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ec4934fff---1576902281.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/a772fc1b1e9ddc748be4b3f9ba047efe/kogitozodijinizabiwagod.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_off0000f593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF593 10456 bytes
SHA-256: a99b2d8dd977fabe169cd4b326996061a78453d4945b571a9d70a2b985b3f603
font_01_sfnt_off00010d52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D52 18468 bytes
SHA-256: 4229df14c678cf04946991f61da1c642b02b7b2cc0fb4a7822c025008533dbfb
font_02_sfnt_off00013d95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.