Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd9ee403a89eb5de…

MALICIOUS

PDF

86.1 KB Created: 2021-07-08 00:10:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e29acf7621c5a11104d0ba9e71f4168e SHA-1: 8a7388df175b3d2ec313eb48bc860b1f5b46f3c5 SHA-256: dd9ee403a89eb5de55d73db38b49311027a596700e74652daa23cefe16854076
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to numerous external websites, many hosted on compromised CMS platforms. The embedded URLs suggest an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://anvlaw.com/userfiles/file/vubexavotikowetusa.pdf In PDF document text
    • http://agriturismoilnoceto.com/userfiles/files/35510273332.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/ekaflrqdebr7i2dk6sej2t85ms/2710735182.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/8233e0fda4d5e78e90e2f81821f747be/54909200502.pdfIn PDF document text
    • https://sitycare.com/FCK-UserFiles/files/51816834532.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d53bf5801b2---vunitutadasizizoka.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/4a3p7c3db5akpur7eidc4m8nq2/10364802865.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/4lf9b16s7409lu58df7tuut2ui/16515288794.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/jezujaxanoxuzosuf.pdfIn PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/fedadudipigomuf.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/31d5e43ce7eecea2d9c740f9bac65400/89909707563.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6b3b2b221---66699953622.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/2f66fde9ca978cfcfbe3b1c2d1633baf/71053741219.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/805a3b4de995fcc47db9495a3919ef0b/18544503734.pdfIn PDF document text
    • http://karinameal.com/imgdish/files/67637363161.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/e0181587ac7c349816dea0f7270c816e/pobem.pdfIn PDF document text
    • http://neonyazilim.com/images/Media/files/memalesir.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/vaxesuzikimu.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b617a220eb---zojubofomumokopikuke.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/13044044711.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/77148724075.pdfIn PDF document text
    • http://portaldo.eu/contenuti/upload/file/kifibomuleja.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/nisokebamiwezov.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/89470071823.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+change+my+messenger+ringtonePDF 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_off0000ed14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED14 10820 bytes
SHA-256: 8618eb0c43e996cf8d13b7516334cdba5d21e18dc5d60917a39499aef0e033d4
font_01_sfnt_off000105e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E3 17316 bytes
SHA-256: 5161e256df581cfc76b38fc459f91853e4ee82c523a6130a5b1e3407ccd1560a
font_02_sfnt_off00013323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13323 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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