Malicious PDF — malware analysis report

Static analysis result for SHA-256 97309164fa0c96c2…

MALICIOUS

PDF

96.5 KB Created: 2021-07-31 22:26:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 898a9382f9d6f5bd8fc27d38fda337be SHA-1: eec8d9536f7e191adea80fc37bcf22050acf8220 SHA-256: 97309164fa0c96c24eec542b356925ecc0837bb35735a109f81b3615c668b23e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous URLs hosted on compromised CMS uploads and disposable domains. These links are likely used to distribute phishing content or further malware stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://pet-fashion.ro/mm/file/gupiv.pdf In PDF document text
    • http://modero.vn/upload/files/41059186867.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/380ede4cf2802201270a4cd68c7329e7/44308313880.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/71925911997.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/bokunudidudufigixu.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-5-26/20210526102410284719.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/5bb5d74b3eb8ac8997ad499964a06772/73174272655.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/97884321486.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/3mtfued5arr16qktfko4l2hlb5/kemoforupowigulidibezasu.pdfIn PDF document text
    • http://studiopiergentili.it/userfiles/files/titekiraxobano.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b8d2d6ebd---wimusegotatozuwudo.pdfIn PDF document text
    • https://eghamatyab.com/basefile/bainbookcom/files/foxosititubi.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/vaxulip.pdfIn PDF document text
    • http://liubeauty.com/luutru/files/nesujep.pdfIn PDF document text
    • http://614move.com/clients/4890/File/sasavupom.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5fac3f34a5---56310738788.pdfIn PDF document text
    • http://championshipsportsrings.com/clients/23492/File/13057927705.pdfIn PDF document text
    • http://soles2walk.cz/data/file/rudukurunizidu.pdfIn PDF document text
    • https://aashianarealty.com/file/10763998232.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16089b788459c6---99640725331.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/7e5099e457d0c192b649ffa65ed52d61/salesemufola.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/92499c6b46a788ae0454991e80bdd30a/63203236667.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa1273cec2---22143141580.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=guided+meditation+script+for+throat+chakraPDF 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_off00011789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11789 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012f9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F9B 16748 bytes
SHA-256: 1a1d7ebc925e747d948059fc2f5d8d50dfd766ecb2abc681a33332648e23c073
font_02_sfnt_off00015afd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AFD 11068 bytes
SHA-256: 884e5c8b1f06c9afc52b4fdaf3d3ed15c9482a033a6ed8d33618e095c9d879d8

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