Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0dcb6ae8a218643…

MALICIOUS

PDF

87.6 KB Created: 2021-07-16 11:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: e3929acdfd81c7d96816659cf301c8ed SHA-1: 55277442ff5e2f8d82f7517e9086350007491e71 SHA-256: d0dcb6ae8a2186431c894ffd0dcb8ba6b93f9280a6084b3bc3e08b19e593d187
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/c4ef918f0d465f013be27d44277212df/kanipavuxosaporewujirudir.pdf In PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c02eae12b79---kevatolimatanajizivalero.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///xefapujozukuwifonudo.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/d478213e3f912283944445126b87da7a/voxokoxudubax.pdfIn PDF document text
    • http://naphogacomposite.com/upload/files/47567166527.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/58bc828a4be4bd13e469e72df8c28203/sotubarideg.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608765c0dbc07---45715387.pdfIn PDF document text
    • https://bestrecycledautoparts.net/images_i/file/merutudafalabinulutor.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/ragagenovivivi.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/2da9qiqmrdjv5mhrts4dteg373/71318996085.pdfIn PDF document text
    • https://callalilyvn.com/upload/files/36624936290.pdfIn PDF document text
    • http://poorclarescork.ie/images/pojivopunamixepefasujeje.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/e5de58da9cc1d2d2bec8ecaad0d2266c/12086857685.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/cd6f39e0e3274679c18538f9b32292b5/89200560742.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/33767278777.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/56181490418.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/2q2gtlvn5504mnr3i0goahea90/63442491302.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/kugibakukorevi.pdfIn PDF document text
    • http://lordbeaverbrook1973.com/clients/76835/File/20221224782.pdfIn PDF document text
    • https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/xajejozizedoniwirofolero.pdfIn PDF document text
    • http://uspeh-kursk.ru/ckfinder/userfiles/files/37339815374.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160f08aad091fe---154282609.pdfIn PDF document text
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/148e9da4339247cf1ac9d77e07b47de9/sodefudodegemape.pdfIn PDF document text
    • https://dailyhondaotomientay.com/upload/files/magonefupabizupu.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/79243941015.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=expensive+types+of+catsPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/gevitinewojijinafilom.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_off0000f3ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CA 17052 bytes
SHA-256: b3c26f0cd887d6f40994d45b289772c7d7c60523112bdabc1d047b0399ba0185
font_01_sfnt_off0001208e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1208E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000138a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138A5 10592 bytes
SHA-256: 041ad3765ae595f67a51844d15b541880d40745f2efa4a68cf1a65893d815b9c