Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea1dc784ff1e41d…

MALICIOUS

PDF

77.4 KB Created: 2021-06-28 09:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 4d2081a96c71e3ff642cdf144ccffd67 SHA-1: e17c2b5fcae6bdd2e70c2a2f6790ba7c2347489a SHA-256: 0ea1dc784ff1e41d53f115e5bfb5037292f7219f9174f824aa6c912bb8b49784
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to external websites, many of which are hosted on compromised WordPress installations. The primary purpose appears to be directing users to malicious content or phishing sites, leveraging the 'utm_term' parameter for tracking.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://cructi.ru/uplcv?utm_term=home+and+exile+chinua+achebe+pdf PDF link annotation
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/pverf33vu4pf1v6gcra571drqn/rilusekajesaxowakoxawus.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/esefuduside.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/a690d241385cca4318bb1143d9c34c67/jumudagok.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd26762649---numomowamupugurebabidud.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/de07ed01cf4b03fd31a6fcf14dde5e21/legis.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/606b01ba90572e1b35a5211900168506/gokusevuvovijumimadu.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160921c3b45e36---mezeba.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607751614e6bd---7511732150.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/3285310466.pdfIn PDF document text
    • http://sciattella.net/images/file/99950246115.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d0158d9bf7e---vuxaxedifasosemibopa.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/zofoka.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/ab048d8f238f315a728ca401ef7eab97/diserewobawedokunudafov.pdfIn PDF document text
    • https://bamor.org/userfiles/file/gimipigifebifebilaf.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/25febe3eee5ca5aca16144d77e9c21ed/jawabaloxu.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf0ad5c8f0---sejezipazateredanilekotup.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160860ff1c89b0---nilugez.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0b89d9b36---tamaluwoxu.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/velamafuxexoruj.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/5ee7f79a636f9deeed1a23e428fcd3ed/wujojeditix.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160957e48cc548---rikafap.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608118d2d7ff2---foxes.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/munerira.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083fe5b7d9a1---35887108292.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/zojov.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/37562954174.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_off0000ccc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC2 16484 bytes
SHA-256: 3ead11b93be02ae2506e5b9dd3698f74a367f3480390af6f6e131d5e48d2f282
font_01_sfnt_off0000f7ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC2 10852 bytes
SHA-256: 4e2b0bd205e20768d86b415a6b206a643a3fffaa78336e913088496defd2fc4d

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