Malicious PDF — malware analysis report

Static analysis result for SHA-256 8375242a4e757773…

MALICIOUS

PDF

75.7 KB Created: 2021-07-25 19:32:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 98053ce6e34a65bbaade5099cd053147 SHA-1: 12cb6353e5fead3d621f20f9f0a0e20736bd6a27 SHA-256: 8375242a4e7577734b3e9c89fa414c722a2fe5e522df9ea670abffaedb7e2e99
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719c23b8435---jazepud.pdf In PDF document text
    • http://blackshirts1962.com/clients/f/f2/f245580d3072b78cda2271cf7a7e3f61/File/10143370976.pdfIn PDF document text
    • http://studioindelicato.com/userfiles/files/68570482934.pdfIn PDF document text
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/kifipefum.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/kazaxiwosogilerupen.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/ac22dcff77d3ecb0086a7997ace7d39a/molupidaxosa.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8dc9de48f---89716454432.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c720f8ba04e---62503739288.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/35227fb7bdb05fb72eec85e86063adc6/titokeguxifaruzak.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609cebaae22a6---sujabaletopukulije.pdfIn PDF document text
    • http://hopkinshigh1961.com/clients/878968/File/77325665285.pdfIn PDF document text
    • http://strandedtattoo.net/file/6060783989.pdfIn PDF document text
    • http://fra2ange.it/userfiles/files/91005000082.pdfIn PDF document text
    • http://ctkupavna.ru/upload/file/55351477553.pdfIn PDF document text
    • http://unioncentralreunion.com/clients/3/3a/3acd25563584ef55397927d4124196c4/File/vepabetegosurav.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/eb6426b50e3b9e4351fee2f6170d1966/92760852850.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/guzetavikukusopiga.pdfIn PDF document text
    • http://quangcongluc.com/upload/files/mofitukosulax.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/4565509804ae49cfdb42fa33e4178c4d/97643793442.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/eib1ppg4rt1bpc0m84eprrb3gs/23304289527.pdfIn PDF document text
    • http://domplus.su/userfiles/files/dejemizuvale.pdfIn PDF document text
    • http://chithanhplastics.com/uploads/userfiles/file/13548414956.pdfIn PDF document text
    • http://kotolantopeni.cz/file/61370632620.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=libro+de+formaci%C3%B3n+c%C3%ADvica+y+%C3%A9tica+2020+primer+gradoPDF 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_off0000befb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEFB 11624 bytes
SHA-256: 716c0b3cfd2e657ff76caf1bb109f0ca36ef10455d649fc02a670107969a26ba
font_01_sfnt_off0000d9ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f1bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BF 17520 bytes
SHA-256: 86ad9555d2579550fb3c908af2d1ba797dfc25e56ba1f8afaa05b324a77d25fe

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