Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8a8284283bd6f13…

MALICIOUS

PDF

80.9 KB Created: 2021-08-24 21:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 19ba347304ff893eb0d00d9217225bbe SHA-1: c00399de9efe660c4294f68b87d52814acd8f8cd SHA-256: f8a8284283bd6f1365e56b152b3839c3151764a8a3126d968aa9de2e3d764087
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to redirect users to malicious content. The presence of multiple unknown URLs indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609833679d07e---47064430439.pdf In PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/61751304644.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/7eb2du0mqj67tjc51dvdf38vq0/43007741245.pdfIn PDF document text
    • https://hoya.hr/UserFiles/file/38296602661.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3ea5d76fe7---gazoxizarix.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/tmudkrmk50hg7s22hnr60e6mgt/20454587114.pdfIn PDF document text
    • http://homeopathyhk.com/files/49053467756.pdfIn PDF document text
    • http://alternatifmedikal.com/img/userfiles/files/niferumixobuvoxepabug.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086195eef953---sumatufolunapawu.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/23225760992.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210623_151405.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/6692a49d95eb940d44af5ae15872f612/gafegexilufi.pdfIn PDF document text
    • http://massimobertoarchitetto.com/userfiles/files/24860541821.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/19991909350.pdfIn PDF document text
    • https://cafesca.info/ckfinder/userfiles/files/dudisiwuniwuruxagagus.pdfIn PDF document text
    • https://bjsteelvietnam.com/upload/fck/file/39334481289.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611dc395c2c83---javurivabikaf.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/7f7a601c01b62246431098112e825c92/42743123726.pdfIn PDF document text
    • http://aquarium-kochi.com/app/webroot/ckfinder/userfiles/files/fasewesavovojubujime.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160dfbe2560e2a---98120159527.pdfIn PDF document text
    • http://xycrusher.com/d/files/devutosebibom.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f20df66d03---batobeja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=what+does+ellen+white+say+about+worshipPDF 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_off0000d7a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A1 17300 bytes
SHA-256: 22ad8ed37fb77ff703d5cb7861fcf1966e4892629d03bcd2ba0341990f1898ac
font_01_sfnt_off000104a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CBC 10920 bytes
SHA-256: 6c33340bdcf7e034ba729d7de7aa1dc763fa8857da0ff12c527e33d29e0cca81

Open this report in the interactive analyzer, or submit your own file for analysis.