Malicious PDF — malware analysis report

Static analysis result for SHA-256 00b2de09d03c4c54…

MALICIOUS

PDF

91.5 KB Created: 2021-09-19 11:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 89c41a88d1d0d5e7d19e1f5d647800a0 SHA-1: 3dee800f1618b031d1a945ab214d46c64565f502 SHA-256: 00b2de09d03c4c547aa81ee25295f23732cd0cde4244fe6b989a9b450a4d8ad2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which point to compromised 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 likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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 http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/9668040206.pdf In PDF document text
    • http://cicm2015.mist.ac.bd/app/webroot/ckfinder/userfiles/files/80628355561.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/3ac2b3b21625791550d661cc528e1293/lodafixegamizapimebexema.pdfIn PDF document text
    • https://pankajplast.com/ckfinder/userfiles/files/fajaluzaxozuxitidem.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/49102433567.pdfIn PDF document text
    • https://cfi-registration.amyhalter.com/buzzboxgift/img/userfiles/files/kopovejadakilijakabafekit.pdfIn PDF document text
    • http://neteyes.eu/editor_up/89737165564.pdfIn PDF document text
    • http://audyt.rowerowaszkola.pl/imgturysta/files/vuxoduzusufunomade.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614045f26586b---vajejufumivobixeragi.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/161330ba2ecb00---begepefusugepirofu.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/30538713636.pdfIn PDF document text
    • http://cadelupo.it/userfiles/files/27090552205.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132dadd5092e---dawetimetexukegijibixab.pdfIn PDF document text
    • http://zekejozsef.eu/FCKfeltoltott/file/95742964093.pdfIn PDF document text
    • http://decoworld.in/dayafter/uploadimages/newsimages/file/xajuxulovugot.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/9f0b4d0f42fe1bf52984b2313edc39e6/fobubuwuxudixazof.pdfIn PDF document text
    • https://georeno.ca/userfiles/files/2945464864.pdfIn PDF document text
    • http://autoscuolecasetta.it/userfiles/files/57764494285.pdfIn PDF document text
    • http://headlinesdinerla.com/uploads/files/vamufodedoraxebosefep.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/iqv82s7i9sj4rtspicv49mhll5/rezulivomamomeri.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/23463809964.pdfIn PDF document text
    • http://dfwsedan.com/nbloom/fckuploads/file/rekiwudegewidumozejefi.pdfIn PDF document text
    • http://gemaeldeundobjekte.de/uploads/files/zusomurode.pdfIn PDF document text
    • https://konferencii.ru/js/ckfinder/userfiles/files/2146872770.pdfIn PDF document text
    • http://imailbox.nl/images/uploadedimages/file/moduvoguduxud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=how+to+disable+auto+save+media+whatsapp+androidPDF 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_off0000e2a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A3 18608 bytes
SHA-256: 4e79e55e6dad823f9ce19f14aae0b802ce13b52b27057e1b5be77ba0fd124e16
font_01_sfnt_off0001006c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006C 17608 bytes
SHA-256: dd500f9505788ddd02e32cfde0ef70df183e6a5f4509d3db80283a3f660a2c4d
font_02_sfnt_off00012de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000145fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145FE 11040 bytes
SHA-256: 19987edf617f2157b33dfa899aebba8c44fbc8d058b309744930f8c6173344d0