Malicious PDF — malware analysis report

Static analysis result for SHA-256 7686471ba6bdaf15…

MALICIOUS

PDF

91.4 KB Created: 2021-09-01 03:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a68b0235eabc76bcf0d92a935067fc04 SHA-1: 2ac68138e216bfa76b838c9e66348206a00b8281 SHA-256: 7686471ba6bdaf15b0528991014fbd8551eb775b668c18eeb2cb5cdf6b527080
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it functions as a link farm, pointing to multiple compromised CMS upload storage locations and disposable hosting domains. The embedded URLs, while some are marked benign, are part of a larger pattern of redirection to potentially malicious sites, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://axiomestates.com/userfiles/file/sagorumeludavigitosik.pdf In PDF document text
    • http://smn68.com/clients/75339/File/88188756229.pdfIn PDF document text
    • https://nmcs.ca/userfiles/files/42084916337.pdfIn PDF document text
    • http://www.radiooro.com.mx/media/images/uploads/files/57840884409.pdfIn PDF document text
    • http://autowassenindex.nl/images/uploads/nadozeviwixelo.pdfIn PDF document text
    • http://canadanur.com/resimler/files/fewupisutovome.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/1ec9cf5892daf1d1f905d47c4ca9eeab/suvolo.pdfIn PDF document text
    • http://zubrcup.by/files/files/20842091190.pdfIn PDF document text
    • http://drlalashow.com/php/billboard/uploads/file/9335118816.pdfIn PDF document text
    • https://pasargadhotelsholding.com/cache/fck_files/file/luligazesorovubibawa.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e92f5020071---devarat.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4de7e0f70---fapikiguvi.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/nufusowedobanuropepirinud.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/vogofijitamivuxe.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/44703454650.pdfIn PDF document text
    • http://bhk-aindling.de/userfiles/files/71277997210.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/dojujupoxosagirob.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1607be7c3bbb1b---tejeb.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/84120195729.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/51968f9d51bde7d384ec606e3fb0c346/madisef.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/d27ucpbbhs9rhp6eoinb2ci5e6/27640101814.pdfIn PDF document text
    • http://rfinshaat.az/userfiles/file/53751754567.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609369e4c64cd---2900618834.pdfIn PDF document text
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/46240482526.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+keep+from+miscarryingPDF 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_off0000fed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED5 11060 bytes
SHA-256: fc953af4615b9e3b1cd9b6c557c7a015d09e87ad24c6c94f163d83f9aa6a5da6
font_01_sfnt_off000118b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B1 17760 bytes
SHA-256: 4978a612ce142115925daab95a9abe4e3c17e80b3ac0addf1cea7c7ac2e90f4f
font_02_sfnt_off000146e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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