Malicious PDF — malware analysis report

Static analysis result for SHA-256 08beb3ad0ba3a549…

MALICIOUS

PDF

142.4 KB Created: 2021-08-26 02:55:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e47d90d8d00906e2a4f8f96c19d9dc2d SHA-1: ef45459a19435028d2f1096456299afef890913d SHA-256: 08beb3ad0ba3a54974467b855f2e1d28066fbb0a1c3e3a5e94725a37e5b7dc78
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The primary attack pattern appears to be a phishing lure or a distribution point for further malware, leveraging compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/8ed7df1bbed66f0939690f6402611f47/18180827304.pdf In PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/92383ea2c2b52d6b3ebdec4229825d82/48460714612.pdfIn PDF document text
    • http://jamesirvinewedding.com/clients/f/f9/f947a18657f5d77a8fcd192ffd4ccf25/File/12709765828.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/92554112582.pdfIn PDF document text
    • https://pieseautocomenzi.ro/userfiles/file/badawabazedifo.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/ligupifizolem.pdfIn PDF document text
    • http://trimblehighalumni.com/clients/84492/File/39766901660.pdfIn PDF document text
    • http://briarcliff70.com/clients/874901/File/wilamoretizakud.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/a399c4ea4ba645a37a7f9e0d26b5f943/4034220941.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/43910197949.pdfIn PDF document text
    • https://apskarota.org/userfiles/file/tumuxareviwima.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/64005032075.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/50a6bebd3432e9b0353922a3a23c8d22/lojifu.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/9045f3a6d2deab2b48352974db194da7/11608749094.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a070766fafb---3660271901.pdfIn PDF document text
    • http://ziconiavip.com/uploadfck/file/fomovokamofewuragikuzor.pdfIn PDF document text
    • http://wintec-samu.hu/uploads/files/nerenebegamubevu.pdfIn PDF document text
    • http://progetec.org/userfiles/files/tewokafewakolekobivazene.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cd15af628c2---52509053310.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/d3mov7oplu88seeguaedts33la/fubupaxakijomipuvaba.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6ba10076c---vajosurakal.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/20949018069.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/gozopijonadiruvenanet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=parsec+is+the+unit+of+measurement+ofPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001aade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AADE 16232 bytes
SHA-256: 338cc954a946a7fbf70b29c55d5e66db99b2ef151e94d540d22e7b387f44db23
font_01_sfnt_off0001c0b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C0B9 22084 bytes
SHA-256: 03677e770ed090cfc6b20217876b6ac77ea62658df9f4788295f5add0e435305
font_02_sfnt_off0001fa29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FA29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00021240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21240 10656 bytes
SHA-256: 262fd97623ecbf6dbcff4dc289fa4a92ad5a421dd35c97172ffa64cba555fb60

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