Malicious PDF — malware analysis report

Static analysis result for SHA-256 328fa2ee633130dc…

MALICIOUS

PDF

97.5 KB Created: 2021-06-30 20:07:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: fd7c00678f3754d860921627a5237da8 SHA-1: 338ee5fc24d46a8fe92ff527b1ec72b5b7055750 SHA-256: 328fa2ee633130dceb07dd6db9b21e91576330b492737c0ebb654e47cb1a99f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics as a link farm, with many distinct hosts and URLs, some pointing to compromised CMS uploads. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The document's structure and embedded URLs suggest it is designed to redirect users to potentially malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://allytemp.ru/uplcv?utm_term=cw21+certified+watchmaker PDF link annotation
    • https://avela.md/userfiles/file/mosepatunelalevobuso.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/bosesufekadowajujo.pdfIn PDF document text
    • http://tryinvest.eu/userfiles/files/8327866017.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/2367bacea78fe9090f251dec0495fca1/dufizotigofovevidume.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160948f4f50d02---78288140577.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083547af3972---kelirepawofenofoxor.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607c92400b95a---sagiwojosad.pdfIn PDF document text
    • http://didopack.com/files/tebubikin.pdfIn PDF document text
    • http://ewinghighclassof1963.com/clients/e/e4/e4cb61fc1babc639533983e887b7272d/File/vezidufatu.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/7d38d1df7bae566a2e8ed300255fbf67/93823479545.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16076e4381c75c---gubevusikobumovo.pdfIn PDF document text
    • http://landpas.pl/upload/file/64835417453.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/xobuzajuvosovibaset.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/pedanomokabuwisit.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/96cb648d48cf62aa287dee0a7577544c/50928064344.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/5a0db2d3cf60147bd7e17ebd4afc9640/nemokugijemegul.pdfIn PDF document text
    • https://bucatariizidite.ro/printuri-fi/files/tidemup.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/gupagesaxa.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/87f75d4e534788b4c054fc0e5158373f/kefufakiwuku.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d50e8d0d12---26086017584.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/acf63b72ebf7f4857727a3430098ae80/23074853883.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c2874fdad0a---34815449250.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc264df8cd---70368861331.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-5-19/20210519131323491631.pdfIn PDF document text
    • http://www.polni.si/Images/files/5818799589.pdfIn PDF document text
    • http://alanaf.ru/userfiles/files/zojedixisigajefujawu.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_off00011769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11769 18068 bytes
SHA-256: f7e1cc269c1fff5c9cf39c2348e9e121af7f1768b5c59fb647f4da3c53e3c30c
font_01_sfnt_off0001468d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1468D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EA4 10684 bytes
SHA-256: 960b146c5abb9eddaeead840f0bac7b5aed995651f0702e1df9ee27660f8a202

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