Malicious PDF — malware analysis report

Static analysis result for SHA-256 0080e4dba9ab767c…

MALICIOUS

PDF

90.0 KB Created: 2021-09-18 23:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 73608245cbf24aa6ff601deea18c41fc SHA-1: 305aa4917e7f2e9cb8d5b5ae860c7a9cd8bc407f SHA-256: 0080e4dba9ab767cf8f8166f5f83e33135ae9759ca143873f720c50646a8ed95
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that function as a link farm, directing users to various domains, some of which appear to be compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were directly extracted, the structure and URL patterns are consistent with malicious PDFs designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://irlanc.ru/uplcv?utm_term=pocket+tube+app+for+android PDF link annotation
    • https://krygina40.ru/UserFiles/File/nomuxemonejovobesolawo.pdfIn PDF document text
    • http://munnartourism.com/uploads/file/73209319949.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/jekagev.pdfIn PDF document text
    • http://csc025.com/userfiles/file/20210904160346_yrigiz.pdfIn PDF document text
    • http://kvarkeno56.ru/userfiles/file/xeraxe.pdfIn PDF document text
    • https://am-system.eu/ckfinder/userfiles/files/89564039178.pdfIn PDF document text
    • http://sevvalturizm.com/rsm/files/44749788714.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/gozodot.pdfIn PDF document text
    • https://cfi-registration.amyhalter.com/buzzboxgift/img/userfiles/files/82937104289.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c04cd9a7de---siwixiwavamikasomo.pdfIn PDF document text
    • http://luyenthidhcanhsat.com/Images_upload/files/rifevevamigog.pdfIn PDF document text
    • http://timebymtm.com/upload/files/suradaxokapakamunokakip.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/34710895200.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/3743dd69ecc7685084f5fb2971a49338/lixifikeve.pdfIn PDF document text
    • https://www.netcorp.hu/data/editorfile/43145634336.pdfIn PDF document text
    • http://fsgzb.com/upfolder/e/files/20210906041143.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/kiwinulomadugedo.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/bujalomanamu.pdfIn PDF document text
    • https://kasihpaham.com/contents/files/wapoxe.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/94894097365.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/rezefir.pdfIn PDF document text
    • https://elpollopaulino.com/cenavarra_userfiles/files/nunenisepivumasikasezaz.pdfIn PDF document text
    • https://360clothing.indicsys.com/home/www360cl/public_html/uploads/images/files/vidadu.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/96107191347.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161441052bebc8---50656684103.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16135cb74751cf---bidifoxorofebivivamejepi.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_off0000faad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAD 17988 bytes
SHA-256: d94302368136040cca9d6e2b770fe8a86c4da6b46f9333488abb09c91598596c
font_01_sfnt_off0001298d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1298D 10732 bytes
SHA-256: 046651b587d5f407fbbfd45f5db3745e41bce42d113711c4bea2b94cd40c2df3
font_02_sfnt_off00014220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14220 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1