Malicious PDF — malware analysis report

Static analysis result for SHA-256 688dfdbe1f5e6ac0…

MALICIOUS

PDF

95.5 KB Created: 2021-09-04 18:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c42c368666f7ab87518b1601b24c4927 SHA-1: 8c191061d0177a62e57381bbd3ce46fd4a2e8e14 SHA-256: 688dfdbe1f5e6ac0ef93e9d4d9b03e899caed814c52f9dc6ec3341f141adae40
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites or disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution through these links. The document's structure and URL patterns are consistent with a link farm designed to evade detection and maximize reach.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/62821e12fc9b4885e654466d3984daeb/54642391336.pdf In PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1612e4ce39371e---vorerul.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/edm8c923cgmt37a7b1rmipj4aj/kadixifatim.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/57273652897.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/1704699c07f708432bbcc52e46b47700/67571556718.pdfIn PDF document text
    • http://9y.bfage.com/upload/files/20210817152649.pdfIn PDF document text
    • http://archidaldegan.eu/userfiles/files/pimifoxeroveputomafapuza.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4266022ff7---33476811378.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/vudafavavula.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/soguneva.pdfIn PDF document text
    • http://harperfamilyreunion.net/clients/3/35/3566a42c83b0accea4ba2bdfee5c7976/File/kijegodido.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609428f9d7028---dekovuvuwodoba.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b423e69133c---59663952175.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607331bde4288---bulejumamuvegoto.pdfIn PDF document text
    • http://swaptoys.org/ckeditor/uploads/files/pugejevupudani.pdfIn PDF document text
    • http://csc-0898.com/userfiles/file/20210825105045_nst8o0.pdfIn PDF document text
    • https://collegemahan.ir/basefile/collegemahanir/files/28356891504.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/85122921125.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/8vtgo784j4gjvohrj7abhssdd5/52508333898.pdfIn PDF document text
    • http://stickerbarcode.com/file_media/file_image/file/rusedexonaw.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/pexegovedukapofudam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=aqa+a+level+biology+textbook+pdf+freePDF link annotation
    • 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_off00010cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001250d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1250D 11044 bytes
SHA-256: ab75c7547b92ed58ee56b6226498353ecccecf31b0f410f99d08492734d101fc
font_02_sfnt_off00013e29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E29 18480 bytes
SHA-256: d1e920b0a98fc165ee5760aa493f1d5378b07b522a83a529fbc9eb5c15fcae69

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