Malicious PDF — malware analysis report

Static analysis result for SHA-256 c00e19ce6557cf96…

MALICIOUS

PDF

90.9 KB Created: 2021-10-11 00:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: af4813810d531926f99686524ef0d2be SHA-1: cd7dc8aef61eed2a5e7efcbf27b673dfb77c0a52 SHA-256: c00e19ce6557cf96f94def6649076c072361a2130570a60f496f2bf52cfb3c03
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to potentially compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade gateway security. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://cructi.ru/uplcv?utm_term=cities+skylines+crack+fr PDF link annotation
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16150738b4353b---dedotidaketudaf.pdfIn PDF document text
    • http://sushrutproctology.org/ckfinder/userfiles/files/sexubojopagomovuxa.pdfIn PDF document text
    • http://www.pilartangguh.com/file/teleru.pdfIn PDF document text
    • http://lovesushiscv.com/uploads/files/dutuletesuges.pdfIn PDF document text
    • https://enilubricantvn.hoakhanh.vn/uploads/image/files/21190943388.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/sanekunegakikipoligidinu.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/15993708423.pdfIn PDF document text
    • http://qazaqbanki.kz/data/content/files/57706484898.pdfIn PDF document text
    • http://udmvdpo.ru/images/files/kamesimemovovux.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/56638953149.pdfIn PDF document text
    • http://bowlingkillers.com/imgdb/files/xefusuwuseguzusotefow.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab91a31688---gedaxa.pdfIn PDF document text
    • http://bjsixiang.com/jingkelun/userfiles/files/20210927124833.pdfIn PDF document text
    • https://svltv.in/userfiles/files/74554454487.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/monoxoxorujiraterudo.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/e3e5f3e5def8797e3c0bad92a6808739/37717563006.pdfIn PDF document text
    • http://ellenia3.eu/userfiles/files/73108852752.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/sibidobixasefovozusabofu.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614df51325d95---47292166659.pdfIn PDF document text
    • http://llux.vn/uploads/files/fepopujiti.pdfIn PDF document text
    • http://lejuriste.ru/files/file/41445237734.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/kalajudawidaxamivi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC63 22900 bytes
SHA-256: 9fcae24ea53df0f8145827ca357f34245f2d069822dc4f5db7aade23568f04ea
font_01_sfnt_off00011727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11727 16352 bytes
SHA-256: 002206b88d26d4e98ed024f396d06a4995f1ea64dec2f3c06384c384b5bb893b
font_02_sfnt_off00012d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D93 10444 bytes
SHA-256: 00170fd2241802061f9ca48b50ce700c183899e08305ec810da88a339fda823a
font_03_sfnt_off00014571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14571 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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