Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0fd30b8da367bee…

MALICIOUS

PDF

75.6 KB Created: 2021-07-01 21:59:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e1c6a6e0bbe8a077ef7e9b30e293b021 SHA-1: 276e936ebdc977a88bbb122274053f1885affa05 SHA-256: c0fd30b8da367bee9b8869675e567cbd0410bd1a9bf302c5fd62a435094ee276
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many pointing to compromised or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://creativitagh.com/pevron/www/img/file/90969908870.pdf
    • http://habitat3.eu/userfiles/files/85453982641.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/ga5pad3826ecccdbd43togapco/87017303065.pdf
    • https://actor-conseil.com/files/file/wazaletibolukalofutap.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/188b9210ab009f08bbe8a88da176a1cd/48134949417.pdf
    • https://zzhqhi.com/d/files/todivugamojulemu.pdf
    • http://ilovegabal.net/fckeditor/_upload/file/dasozabesaze.pdf
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/ee13e28beb9953f2e5febf5441be1a48/buvizokawi.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/d43e752f0a0816b73929ef8fe111ae7f/65834551832.pdf
    • https://nnkcreations.com/userfiles/file/49365074197.pdf
    • https://aradmissions.com/ci/userfiles/files/24890487254.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5e823be79---70948471854.pdf
    • https://socohoteldanang.com/uploads/image/files/89265643290.pdf
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/ek1op7fitjere7k11vrbf0gk84/batonabatofaporapema.pdf
    • http://allmedicus.com/userfiles/file/50192692641.pdf
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/mh086u348qig9a7tadehgf5h64/64773045036.pdf
    • http://jaatkinson.com/userimages/98609231761.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/182a3ac8fdcd176e4caa099c9ce054ef/jusepoxafam.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f98fc429e---73183615358.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b16c382f895---11958978959.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c98b6cebacd---82568365431.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf75fddb4c3---94060755655.pdf
    • https://masini-de-ambalat.ro/images/userfiles/mizejiviramiroze.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=cover+me+in+sunshine+pink
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4ad.bin
54b262b4b434ee823070b075ded4f6608975f005611218dac9a034b0f934d9ca
pdf-font-stream PDF embedded font (sfnt) at offset 0xC4AD 10500 bytes
font_01_sfnt_off0000dc61.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC61 16792 bytes
font_02_sfnt_off0000f473.bin
b1a43c95aa7265438a76bc9da7ec5c9d98743cfafa384f748e46e105768e5730
pdf-font-stream PDF embedded font (sfnt) at offset 0xF473 17280 bytes