Malicious PDF — malware analysis report

Static analysis result for SHA-256 14809dbd0e512454…

MALICIOUS

PDF

80.0 KB Created: 2021-09-03 05:50:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c9a48ccf98c8e6231d5626f1a0788395 SHA-1: 6b1550294a84af031929dec66131a0e593be4ce0 SHA-256: 14809dbd0e512454d1f1833c529d0280fdff8e5334b07b95f2e09c93d038dfb5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of an attempt to trick users into downloading further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612365b955648---dimilineregizonijola.pdf In PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/zuduwejovujo.pdfIn PDF document text
    • http://concept-art.nl/app/webroot/files/userfiles/files/67756106718.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/b149e4072edc33b930ca6cb90064166d/50017389437.pdfIn PDF document text
    • https://ximatinhdongnai.com/app/webroot/files/images/pages/files/piviraxolavuzade.pdfIn PDF document text
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/ff7e7bb5dbc22479ee2dabca86548ba5/31093573361.pdfIn PDF document text
    • http://www.irrv.org/uploads/files/75232246920.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/6d7e9b953e52333449497f4c0bb29b67/zoguse.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/96133671276.pdfIn PDF document text
    • http://ausafe.net/images/art/files/75782203320.pdfIn PDF document text
    • http://volkshilfe-ktn.at/images/content/files/76707960387.pdfIn PDF document text
    • https://mlspoland.co/files/file/vodezawelu.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16079df471c86d---mopelevodoxanotazuvumeb.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/8cb52f078aef57cf371d4a115174c966/visolunidisum.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/96a6a917b29d6d289a4c84e812beb3eb/63858063950.pdfIn PDF document text
    • http://fteq.ru/files/file/90860517997.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/kanidusoraguberawim.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/to45fnuqe4c9ubmrtuqpok8963/tazarifuniterovajuzawid.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe0007432c---xisovitorika.pdfIn PDF document text
    • https://homecareangels.ca/files/files/files/wogevovunuzusijiga.pdfIn PDF document text
    • http://lobanowscy.pl/userfiles/file/55014939793.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/52957305195.pdfIn PDF document text
    • http://biomax.shop/filespath/files/20210821073853.pdfIn PDF document text
    • http://astorandblack.net/emailer/userfiles/file/jazimisesenakosope.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/7841001523.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=the+new+human+rights+movement+pdf+free+downloadPDF 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_off0000d231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD231 11160 bytes
SHA-256: d97b40ea6a4706bc6cbf9551596015f5c5e94becc20ab2a9e1615440eb6bcebe
font_01_sfnt_off0000ebe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE8 17456 bytes
SHA-256: d80394137d5aaca78f94efeefb1a56f38afcf027fd9810fd0db53aee16cd6ebf
font_02_sfnt_off0001196a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1