Malicious PDF — malware analysis report

Static analysis result for SHA-256 38bdc0219c27504c…

MALICIOUS

PDF

74.1 KB Created: 2021-07-03 16:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 56537e4d4d4e650c8e68bce0daedca8c SHA-1: 9324dadf57ddf183bd6e1a9381473828acb31eba SHA-256: 38bdc0219c27504cbde41bf4a649be24e6b87811dd0128da88d0b78866e83fe3
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised CMS upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple links on disposable hosting and compromised WordPress sites reinforces the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 http://chinalanpa.com/images/upload/File/kemisudanexetebidowixu.pdf In PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/bdc4be3aade61baf7dd8829a9e2c70a5/60774713725.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/50265487968.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/f283df96945402deca096b39919ba480/38677579963.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b30278626ad---18396242387.pdfIn PDF document text
    • https://xn--hjrnskadeakademien-mtb.se/userfiles/file/fosubegarelalez.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8e693569c---3709881548.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098e6580d578---59664599987.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/0475e0c28799dcad78f5c9a3aec8866f/26336852594.pdfIn PDF document text
    • https://coatielectronica.com/files/18232442846.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/14739303244.pdfIn PDF document text
    • http://galgalesh.com/userfiles/file/fixogapava.pdfIn PDF document text
    • http://japan-railpass.info/images/blog//file/46662526286.pdfIn PDF document text
    • http://iziusb.com/userfiles//file/46862679855.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c51b9eb3e---16256454491.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c91455caf3---84995806341.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/1fdopl25abc2s2q048fm9lf5f5/golonala.pdfIn PDF document text
    • http://castudio.eu/userfiles/files/poruwifus.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/nepafukosevatoxasolif.pdfIn PDF document text
    • https://ce-mi.pl/uploads/userfiles/files/48714920251.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/vbg8rg48037co1ckonr4mo50p7/59148412464.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=square+root+parent+function+graphPDF 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_off0000bedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEDC 10864 bytes
SHA-256: 3a0c95563d98334f9ef1194eae762804a0da2a844833d567db1c7dff1e6a4ee0
font_01_sfnt_off0000d79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD79D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000efaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAF 16664 bytes
SHA-256: b2ecbfb337e745b21b9d05cf26a2526c96c2709ea365a8a1ca71565f2f51e15c

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