Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b2a80c7eaf3685…

MALICIOUS

PDF

81.7 KB Created: 2021-09-07 22:08:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a3d79fd35e9f4f6d0e7c6ddcd540d364 SHA-1: 8ad2a0388845b6a6370a84d839a4fb2b417715ed SHA-256: 22b2a80c7eaf3685e16f1a8a788378dddca127f20f629491437f8d4f4664eb49
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous URLs, many pointing to WordPress sites utilizing the 'super-forms' or 'formcraft' plugins, suggesting a link farm hosted on potentially compromised infrastructure. The presence of these links, combined with the PDF structure, points towards a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/0a93c867c0b2a31c02e3330092beb14c/vodamolesimunakugejupawo.pdf In PDF document text
    • http://wfuchiomega.com/clients/4/46/46a815049f9cfb11ab63b386d19cdfb8/File/medowi.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/0164dbdc6c145faace53985a71ccafa6/wajisuvajuxuf.pdfIn PDF document text
    • http://dogable.de/userfiles/file/gekewapakapuzimo.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1610983ff90e5b---81767559870.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a093a71d7c8---xuguwuzod.pdfIn PDF document text
    • http://cmrivestimenti.com/userfiles/files/62908590889.pdfIn PDF document text
    • https://heritran.vn/uploads/news_file/82813417013.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609352a48b7b1---lezexoroj.pdfIn PDF document text
    • http://cokhisah.com/webroot/img/files/jagixanixidej.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/vb2ia3vh1bggi0mffljvjsgcoq/gojadoralalak.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/tou86g0ikbuh4iqr6hh29fi1l6/12466654670.pdfIn PDF document text
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/sabenub.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fb0fcfb494e131a721df5478abb71a4f/gukuxepega.pdfIn PDF document text
    • http://bgindus.com/t/tutorfirm/uploads/ck/files/pivil.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/5542f41f348c108223c1529520c5f1f8/wesuvirirubigugirapedomif.pdfIn PDF document text
    • https://habibitours.org/ckfinder/userfiles/files/82832931923.pdfIn PDF document text
    • https://www.traitagri-solutions-alternatives.fr/ckfinder/userfiles/files/danafake.pdfIn PDF document text
    • http://nandishoverseas.com/UserFiles/File/99341946128.pdfIn PDF document text
    • https://vrrc.heart.net.tw/ckfinder/ckfiles/files/11834791899.pdfIn PDF document text
    • http://nakajima-ya.com/upload/save_image/files/joromuzixonuwobuxumirurup.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/vemibi.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d702f3edf8---zutoselaxigajoxo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=diathesis+stress+model+schizophrenia+pdfPDF 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_off0000dc7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7A 10944 bytes
SHA-256: 2adef5d8c5918c058d981d6df7c4097a221a34d8f5720a6e3a5a3f3ea8b7b770
font_01_sfnt_off0000f5b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B2 16788 bytes
SHA-256: 5c23609a0efbad74cc6a0f58c8137aa89dc7e611c8402dcd60381996be412b90
font_02_sfnt_off00012103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12103 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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