Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f7574af9c279b2…

MALICIOUS

PDF

84.2 KB Created: 2021-09-01 20:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ef6ef4439a9ab91978e21305e1e7f448 SHA-1: 81061be705d57b3315438c80918ddac6e5d08471 SHA-256: 59f7574af9c279b237c6264271c38e7a12d01af3a0ca6e117b80857cd6a0e6e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a link farm designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=i+am+the+son+of+god+bible+verse PDF link annotation
    • https://eatorhours.org/e-bussiness/fckimages/file/77816956894.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/pevani.pdfIn PDF document text
    • https://ajansnigde.com/resimler/files/sujapososi.pdfIn PDF document text
    • https://lmetinternationalschool.in/ckeditor/ckfinder/userfiles/files/16450915941.pdfIn PDF document text
    • https://bucatariizidite.ro/printuri-fi/files/45185332856.pdfIn PDF document text
    • http://es-manzokudou.com/yamituki-n/uploads/files/bixewamobeteko.pdfIn PDF document text
    • https://mayurherbal.com/userfiles/file/gagij.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/gevurutunegenegem.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/8004acbc4ab6d2d9cb1c5c6dc32bf16c/93260247155.pdfIn PDF document text
    • http://ecosdaliberdade.com/ckfinder/userfiles/files/tonevimasexu.pdfIn PDF document text
    • https://elemonbg.com/Files/File/bedusumisezok.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e05039b32---rubaje.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c5b2d53b5---45064521434.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021071009333273499.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/nokilegu.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/16928708175.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8eada17cef---bunobepab.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/toxavazamitegifanijal.pdfIn PDF document text
    • https://farmacieitaliane.com/documenti/file/74539629149.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/puxadatilotasazat.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608304aeae2ea---43200913961.pdfIn PDF document text
    • https://rieker-consulting.eu/files/file/xowabodutexorogonukaduxi.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/54218274704.pdfIn PDF document text
    • https://funbugs.ie/files/file/tukamogozaw.pdfIn PDF document text
    • http://smwiarus.pl/ckfinder/userfiles/files/27409180468.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_off0000e497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE497 10956 bytes
SHA-256: 481220c515ee490d1ee3ddfdae6622bd3209647eff1fc680de750ad0ccd69d7a
font_01_sfnt_off0000fd92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD92 17780 bytes
SHA-256: 996e25e6982bb414d3a1e1b8309b91d5871bd370350c57a3b7357b6d3b0e99ce
font_02_sfnt_off00012b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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