Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc9c4f03592f041c…

MALICIOUS

PDF

106.5 KB Created: 2021-09-06 09:52:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 819e15031c0e3843fdd34109afdb27a3 SHA-1: 200fa4c29999ebaeb894d90bd2d0b1199bfae7f2 SHA-256: fc9c4f03592f041cc5a4951af730136c8c001f447c283093de4c783130f58841
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://studio45.live/wp-content/plugins/super-forms/uploads/php/files/l1ib83uh1cs2kjp9uds02spi37/nepasoligotodomo.pdf In PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f297db60bd---jipemutenerijadakunidi.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/161348580bc23d---zomivosazi.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/217fctjqkpg48qdnpbu31382t2/22133142963.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/87db998cc1561ac6bdb335639da17016/bipakegowukesilowelopon.pdfIn PDF document text
    • http://cl-pub.com/files/files/dabarufulonadububer.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093e89b08228---69046653549.pdfIn PDF document text
    • http://transportdiverse.com/uploads/files/84565118760.pdfIn PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/vunikonokufutesidirun.pdfIn PDF document text
    • https://bor-diing.com/upload/files/tuwil.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acce7069e88---99029080887.pdfIn PDF document text
    • https://firesystem.ro/imagini_ws/33228662370.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/f594564f8faec1579a7d9606e142cc3f/wutukol.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9c3bc41098---93984820494.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/r642s2v6etr9vpn0rocgm5bhdv/ludawuxosokakovagitiva.pdfIn PDF document text
    • http://iviltra.lt/images/files/kemepekatuma.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160811faf7be74---famotajawirojuw.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba02b587733---61099175639.pdfIn PDF document text
    • http://xn--hy1bt45apoap01a.net/jangheung/userfiles/file/gafoti.pdfIn PDF document text
    • http://delve-cr.com/uploads/8960359681.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160978541c8df2---95406072544.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/refagubedujokuganu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=3+phase+induction+motor+connection+pdfPDF 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_off00013951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13951 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15168 11016 bytes
SHA-256: 428cd219e1fa738b3601b94495f02fa92223e7405abf903104c4806eea9e2023
font_02_sfnt_off00016acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16ACC 18908 bytes
SHA-256: 75660a7ae064750dd64874eee3bfcbababe7d29d421b66a319b5bc9f6d6d5dec

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