Malicious PDF — malware analysis report

Static analysis result for SHA-256 c315da7cf3bdbe5c…

MALICIOUS

PDF

80.0 KB Created: 2021-09-22 11:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1122d618c876a7fee5d92b6dd38bdfd8 SHA-1: cf280a4bedbec35567733c0b61e6f832fdab781d SHA-256: c315da7cf3bdbe5cf0db01bc9bc67210f1d1059f104061e6d6b501197901303e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/56bfb71731223e6ebaf074b629b704d3/38237718997.pdf In PDF document text
    • http://stin-verdon.fr/assets/Image/files/toxamutimojorude.pdfIn PDF document text
    • https://www.mftelhas.com.br/adm/Editor/ckfinder/userfiles/files/motibosegivimamusijosama.pdfIn PDF document text
    • http://heorungminhphat.com/luutru/files/47057279986.pdfIn PDF document text
    • http://werkschoenenverkoop.nl/images/docman/files/66743851542.pdfIn PDF document text
    • http://gachtrangtritranvinhtin.com/gachtrangtritranvinhtin/Images_upload/files/belisakitij.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/supoxiwujafuxav.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/famalipeto.pdfIn PDF document text
    • https://gencshow.com/upload/ckfinder/files/95751182515.pdfIn PDF document text
    • https://www.sesc-am.com.br/Selecao/ckfinder/files/42663620378.pdfIn PDF document text
    • http://sksound.com/userfiles/file/jurejeforu.pdfIn PDF document text
    • https://wecareprogram.org/images/file/sowiwilimesagad.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/55238566257.pdfIn PDF document text
    • http://www.dgtrans.co.th/login/ckfinder/userfiles/files/14227146057.pdfIn PDF document text
    • http://ieeepes-thailand.org/app/webroot/files/files/boxit.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/rojuzitilixokiguwojulafun.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0a5795699---dipotetaguxup.pdfIn PDF document text
    • https://pasarantogel.com/contents/files/banozerudubivufajojonaj.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/10183556238.pdfIn PDF document text
    • http://www.centralperdana.com/file/66828369889.pdfIn PDF document text
    • http://euhoca.com/js/ckfinder/userfiles/files/99284969055.pdfIn PDF document text
    • http://azseal.net/uploads/userfiles/file/9503443326.pdfIn PDF document text
    • https://natatourism.com/userfiles/files/riwakepegewenajilom.pdfIn PDF document text
    • https://munis-roquesalbes.cat/demo/vilalba/imatges/file/43932831800.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/06020307dc97f5e84231e70657120c52/tepodiwiwugirejilito.pdfIn PDF document text
    • https://milliondollardesiclub.com/upload_files/featured/files/56876290476.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=lego+creator+islands+mod+apkPDF link annotation
    • https://www.assessment.unibe.ch/app/webroot/js/ckfinder/userfiles/files/tosoxobixazusuduwutod.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_off0000d2ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2AD 17728 bytes
SHA-256: 52e9d7c313fe8de0b54cbbee6236c5e6effe2602b123126aa9fa70f748fbaa2a
font_01_sfnt_off000100d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EA 10908 bytes
SHA-256: 8db6e3e2bb24603e2a3677dda75860ccff40684f69b062d06f79636f9a89c513

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