Malicious PDF — malware analysis report

Static analysis result for SHA-256 2be8b73e671446e7…

MALICIOUS

PDF

82.3 KB Created: 2021-09-19 08:38:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5d5ce6fd456d8f416d0bad13c2f7b962 SHA-1: 7f44919cf52240a18aa5faf50ebaa3dc2f6a4b2b SHA-256: 2be8b73e671446e757d6d49e792977b0f55d85b3286d4e011bceaa1e6c50ecbf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm to distribute malicious content. The presence of external URI heuristics and link farm indicators strongly supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://queure.ru/uplcv?utm_term=kick+the+buddy+hack+game PDF link annotation
    • http://olgapolyakova.com/files/files/pelulirofemufepujajij.pdfIn PDF document text
    • http://hondatayho.vn/images/ckeditor/files/rujujixezugexewa.pdfIn PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/8554207036.pdfIn PDF document text
    • http://montoaneli.com/ckfinder/files/16194159003.pdfIn PDF document text
    • http://julianina.de/upload/file/xenulibugelazuw.pdfIn PDF document text
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/31238456448.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/3gchn08qm0n3vbqoj3f9up99qu/kujoxad.pdfIn PDF document text
    • http://cs-web-design.de/ablage/userfiles/files/dofiboxudiwowazeratiki.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/bfab7f54c52e340821b7bafa367bcdca/40640661045.pdfIn PDF document text
    • https://karolinanowak.com/userfiles/file/kisimogesokegaloz.pdfIn PDF document text
    • http://abwcoliseum.com/uploads/files/vekatovuwonota.pdfIn PDF document text
    • https://aldapa.eus/files/galeria/files/95565152681.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/29814674269.pdfIn PDF document text
    • https://nirkongrp.com/ckfinder/userfiles/files/xeguponawadatatirugujamu.pdfIn PDF document text
    • http://karinameal.ru/imgdish/files/jabufemoturubekos.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/35408277123.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/l5qa83jdi1o914atqbeoic5lj4/zogarutuwotusaxutavakako.pdfIn PDF document text
    • http://liga-stf.ru/i/upload/files/33341409896.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/161421593a3ca5---2544101042.pdfIn PDF document text
    • http://www.jobibon.com/admin/userfiles/file/25090942052.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135bcb1ea4aa---50009710568.pdfIn PDF document text
    • https://namkhoasaigon.vn/web/images/files/girenodisumenez.pdfIn PDF document text
    • http://qualityfirstservices.pro/testingsites/advantage_aviation/assets/media/file/mojolopepefekituvo.pdfIn PDF document text
    • http://jtravel.clickis.kr/FileData/ckfinder/files/20210915_1C640014A9938A72.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/23378292949.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613386117e207---7641986155.pdfIn PDF document text
    • http://nwhouse.ru/uploads/file/41803029268.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_off0000db1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32D 17796 bytes
SHA-256: 7535d8c3b15689bb65c4657a83dad7db69509e24e16e6160927a5beb4adee766
font_02_sfnt_off00012116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12116 10716 bytes
SHA-256: d3c72116d799fba8615ea645e2bf67e24972730abbfda8c141f48b77bdbb7c29

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