Malicious PDF — malware analysis report

Static analysis result for SHA-256 abd448b6d0aacc63…

MALICIOUS

PDF

85.8 KB Created: 2021-09-01 19:55:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: e9b3d4f3d105fb921671ca282ab93a0d SHA-1: 380fafd3b6782b631c008d7902936a30b603c4e6 SHA-256: abd448b6d0aacc637d7d4127c02c020ee65afe6a5d4772adaeba576c26123c33
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host or distribute malicious content. While no scripts were directly extracted, the presence of numerous external links indicates a likely redirection or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://libertyquad72.fr/userfiles/file/59280168677.pdf In PDF document text
    • http://php-lounge.de/userfiles/file/28062567988.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa264f47536---bafakaxaluw.pdfIn PDF document text
    • http://starkhigh1972.com/clients/d/dd/dd83d6d7846a033806cdb512e10d7d7c/File/pexanuvileruvumi.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/posomokigiron.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1612f365bc1489---12639305791.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071399a0cc62---kivoxabijerapufaxuwona.pdfIn PDF document text
    • http://blueview.nl/app/webroot/files/userfiles/files/vowapiputitov.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/4374b61dbb2682ed6bd64fb430cbdd99/najigelano.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/b7304cde87b8ff5b8fe0b980d313bcb6/makefizo.pdfIn PDF document text
    • https://laznia-radom.pl/userfiles/file/97175309880.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4d019f056---45970182928.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c04ac02d6b0---73885179083.pdfIn PDF document text
    • http://fluorescent-training.com/file/rozexafodo.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609404baefb70---wusikiz.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/nezepetobide.pdfIn PDF document text
    • http://rickgrisolia.com/userfiles/files/98179269098.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2274e00ac4---bojotinujobexor.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/s1vbdtrpfji1da94gda0m6qlug/koxopowojiwemuxabozeroso.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/pohgpca416frpi7pbapmeact55/xedavokexugujazam.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/31c860a6a1adf5190a5e169a97f7a125/13687546621.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608af74b6bdcd---saxof.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/40653628957.pdfIn PDF document text
    • http://ibshop.gr/uploads/_uploads/files/dinufemedebilutuweda.pdfIn PDF document text
    • http://goodlife88.com/uploads/files/befuwabudisiralimomosowu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=master+degree+interview+self+introduction+samplePDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/e7f48d29dc1f8a0e37b45dad4037e59e/bujipiluwapaki.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_off0000e63b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63B 18356 bytes
SHA-256: f6efaf18d6521d7261c8fa2d9b6d85b75307e76f4e9f9a4462e356e9e378f3fd
font_01_sfnt_off00011614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11614 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E2B 11208 bytes
SHA-256: 91183c6ff7aa063db25b7a39e87fd398aca7b9ad5eb356e3935702ec99b68cba