Malicious PDF — malware analysis report

Static analysis result for SHA-256 d744f7ee3b466677…

MALICIOUS

PDF

77.7 KB Created: 2021-09-24 17:51:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 07f34d12afa095e6487f88794a53d96e SHA-1: bd77a19112ee118e560373e3dbbe1237e9a6ad95 SHA-256: d744f7ee3b46667784fcc401aea6a38e5411cef41dd402f313c59be12e8a04bc
172 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating an attempt to redirect users to malicious sites. Heuristics suggest this is a link farm hosted on compromised or disposable infrastructure, likely for phishing or malware distribution. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 8

  • 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.
  • JavaScript action low 1 related finding PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://synerhu.ru/uplcv?utm_term=pokemon+prism+gba+download PDF link annotation
    • http://sbcnepal.com/images/file/vesoxawasulaneru.pdfIn PDF document text
    • http://jamesandsons.ca/userfiles/file/jejifixoxumajitoja.pdfIn PDF document text
    • http://condominiobrisasdelnorte.com/userfiles/file/pedulalofewulinaredezivut.pdfIn PDF document text
    • https://odlingfamily.com/userfiles/file/zufuzapaxix.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/f605b754273784ca73ff5990d334cda7/28397047138.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/xivodisolisaju.pdfIn PDF document text
    • http://48bulls.com/js/upload/files/25814979537.pdfIn PDF document text
    • http://media-production.net/admin/ckfinder/userfiles/files/sabofevakimapuda.pdfIn PDF document text
    • https://myshalewell.com/userfiles/file/gafibaziviv.pdfIn PDF document text
    • http://mamnonkitty.com/webroot/img/posts/files/bafol.pdfIn PDF document text
    • http://mclarenquartz.in/ci/userfiles/files/vojabasafimilifir.pdfIn PDF document text
    • http://vinczeandlaszlo.com/upload/lupudo.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/xovezidukutogeduruloban.pdfIn PDF document text
    • http://mmckno2010.zkosuchdol.info/files/6737842525.pdfIn PDF document text
    • http://study4student.com/cache/fck_files/file/wepetivinuve.pdfIn PDF document text
    • http://prochem.vn/images/uploads/files/91180954598.pdfIn PDF document text
    • https://miminku3.com/contents/files/futizo.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/udo9usanfvtr0o8av66v923r47/nefikerabix.pdfIn PDF document text
    • http://standartbio.com/fckfiles/file/93680942285.pdfIn PDF document text
    • https://renebeumer.nl/userfiles/file/41283101476.pdfIn PDF document text
    • https://imahima.xyz/js/ckfinder/userfiles/files/71299448273.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/baxekufibebeto.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/f07316bb4f2256b089f973848ff1e535/wujeriroraxibozezato.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///telupa.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/nagafa.pdfIn PDF document text
    • http://eco-building.cz/UserFiles/File/43611753891.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_off0000c34b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC34B 10956 bytes
SHA-256: a836600381e9666953fb1ad142f96b9f94e471b74fac8e140a236f384133da1d
font_01_sfnt_off0000dc45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC45 20012 bytes
SHA-256: 9e55279cd55463b40ea89dc50703590783fc4bcbcca1dfebdd0c20956ea6a02f
font_02_sfnt_off0001106a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1106A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1