Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc44019c2e272ef…

MALICIOUS

PDF

86.6 KB Created: 2021-07-30 14:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fa2f3cb332ae989ca12880a65eb9f49e SHA-1: ffa86562c6982257491104fc3ba54b9162d1adaf SHA-256: fbc44019c2e272ef22a29e732fc3eb1efc1c693cf6ae028aafae113712882163
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or content-distribution attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://irlanc.ru/uplcv?utm_term=what+are+the+core+values+of+work+ethics PDF link annotation
    • http://arci-mp.fr/admin/File/98549737759.pdfIn PDF document text
    • http://agroanaliz.by/upload/editor/files/52082472209.pdfIn PDF document text
    • http://uni-farm.pl/ckfinder/userfiles/files/35033088039.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab534344b5a---pukixizotu.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a63499af38c---36363097862.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/6a3253ff7cbfda414900d4217075ed08/makuvusamapevurid.pdfIn PDF document text
    • http://bscartridge.com/pic/82357547936.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/35108868390.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/3145287aae47d017f9748fc3263fa7bc/tazilemurojur.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bd96f4efaa0---kutodawoj.pdfIn PDF document text
    • http://xigmatek.com/upload/files/13825792444.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/d7433c06907548bbebbe523e965b4dd0/53574744101.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/8o5bk2bt9d7alcns6klhuffek3/22232547086.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b53d21f12---69826585601.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/7a5941db3f5577bcf9ff6ddbbb6eb858/26025052383.pdfIn PDF document text
    • http://lucann.com/Upload/file/53731281478.pdfIn PDF document text
    • http://www.39koratmachinery.com/file_upload/files/94137866069.pdfIn PDF document text
    • https://forumhrdbekasi.com/webroot/userfiles/files/82803672090.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/vanabemataxidefogitov.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/92676636366.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bf3c7fd2f6b---31105392936.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/nuxevazilariwekosilu.pdfIn PDF document text
    • 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_off0000f199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF199 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AB 16088 bytes
SHA-256: 94e25c1be7d3f4cf1cfb69a2d965fb3ed1ae75155d2f967da7fb71f32e1a21eb
font_02_sfnt_off000132e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132E6 10668 bytes
SHA-256: 1e74adf779b9615652ce68e4c65d203dab5c274526ff750b9b9d491859e9903c

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