Malicious PDF — malware analysis report

Static analysis result for SHA-256 df84316eb61baa70…

MALICIOUS

PDF

86.2 KB Created: 2021-07-05 12:34:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c80db08b33be5aacf454045f490dc8fc SHA-1: 538fb3f1b92b9d1738f169ab43503970281c922c SHA-256: df84316eb61baa7025c5b0e3bf8c357718d6c70c836086f43a73367695d8e873
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple domains, with several URLs pointing to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL targets are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://binarbaidfabrication.com/public_html/userfiles/file/87231389508.pdf
    • http://beloezoloto.ru/userfiles/file/65719005759.pdf
    • http://ylplj.com/ckfinder/userfiles/files/82738537683.pdf
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/5ccee6906ec2a849d3d97f40adefeca9/retafosebimib.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/abcetadkis2meeec1nmmoom1j7/74160619485.pdf
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/256df8a5efbb54eedefc5a1b689ef193/febifaboputogupitekopej.pdf
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160812c18e98b1---43684665938.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/2edrs85s5g160vnpj7df5ba2r7/24381704639.pdf
    • http://cy2hand.com/userfiles/risit.pdf
    • https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/35e28b334184aff2f3decf9689c23543/10062854689.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d505aa61c---69330264692.pdf
    • http://huiking.cn/uploads/file/031418202004.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073142e2a172---92276767779.pdf
    • https://majorsagilekvaros.hu/uploads/file/fuwukeduxapub.pdf
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/bb6be5ea37477e9fd8ba27e5e266596a/pexuni.pdf
    • http://azizolace.cz/images/file/fufaxanewedamozov.pdf
    • https://flomogroup.com/upload/files/netowasazukuzaro.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/jjks8imn4gk54e0766raijkk20/wupewuwutoj.pdf
    • http://goddesshair.net/upload/users/files/68065075487.pdf
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076041856a99---64570462138.pdf
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/ric486vb2p4c0hrtbdfrpl8dsf/28072814793.pdf
    • http://abwingsmd.com/uploads/files/bajokomizafezitesinujeris.pdf
    • https://0a3exp.com/upfiles/editor/files/89264730324.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/c0b2a0199ccb34b38ea53f60fe502c9a/buxifeke.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c81c613f23---tigavirejaxamaru.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=problem+statement+example+for+software+project
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edb3.bin
213f32d6dfba66003da0ff1fa6ec448ab2439b7b25d17b69d16659baf8a74096
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB3 11008 bytes
font_01_sfnt_off00010739.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10739 16792 bytes
font_02_sfnt_off00011f4b.bin
339559a348baf48c57c93a30aea508a2f75ab1a418f7dc802440ddafa1196f58
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4B 16772 bytes