Malicious PDF — malware analysis report

Static analysis result for SHA-256 dac23e69fd4e48d4…

MALICIOUS

PDF

83.6 KB Created: 2021-07-03 12:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 187098a01d65f1dc33a1a4413f6cea50 SHA-1: 321ca6f76bc5483c3eb07faa8b30d2469ec8b6ca SHA-256: dac23e69fd4e48d4c1182a3444462390fb4cbddb2e556dd6444835e7d374b88d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing lure. The document's content and embedded links suggest it is designed to trick users into providing sensitive information, such as one-time codes or MFA approvals, consistent with credential harvesting. The numerous embedded URLs point to compromised CMS uploads, indicating a distribution method.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/dcanbv847690959t2bm0965c56/21674897480.pdf In PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a8413bfbd---xenaxefika.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/df4c5f512ea878f8cae7caea1e0d6b08/tatalixotofoxupa.pdfIn PDF document text
    • http://lahma.pl/_u/userfiles/file/98260684655.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/8f8c2f24fcb074099d5b57885fc30096/womudakatepela.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/n52sephjjl041k7c6a3cgn9mi7/dedinuzavul.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/1184086821.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160b9be9ce20b2---51061376526.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081247a74385---patebaferinivogel.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/94844139762.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/6093387639.pdfIn PDF document text
    • http://bigband-ulm.de/userfiles/files/61154617795.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/eckitsj79km4mp7k64tau2pm8e/nejisixumamopifuxavo.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/vazifiju.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/34632230948.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/eeae3e2e810a2109c97a62558c5f6127/11600410926.pdfIn PDF document text
    • http://teleserviciomalaga.com/ckfinder/userfiles/files/numarirusuxiliv.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/xuzemeganibapopomo.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/bda35e44d6836fcfff8e9638e6dc5910/gidagigavavo.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf2f7a00c4---jasofuzifuwatuxo.pdfIn PDF document text
    • https://hotellemaritime.com/hotel/upload/files/90651697253.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/be686f9082bcc7e5041521e8511468e7/57033499917.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/24538914649.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+delete+a+fortnite+accountPDF 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_off0000e325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE325 10480 bytes
SHA-256: 5a18790c6e21fffb3e8f80ef5fc9aa450d8e328a3ec1582f29da51efa9311880
font_01_sfnt_off0000fb10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11322 16964 bytes
SHA-256: 951018df41e401520aecbf5585e7808242093d7fb2b9f700f3b9057cb3505cc9

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