Malicious PDF — malware analysis report

Static analysis result for SHA-256 703fda61e0482161…

MALICIOUS

PDF

87.6 KB Created: 2021-06-27 09:43:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: adce6f164b819e90bcf0953f0f0aaa9f SHA-1: 8aea87d0ed9c42c3e1a07fc1bdce1f3b5cf315b9 SHA-256: 703fda61e0482161daeb8b90326b290d5294f4ac85a1046e6bfce2ae889c3bbb
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document contains a link farm pointing to multiple domains, some of which appear to be compromised WordPress installations or disposable hosting. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://etasystem.net/userfiles/files/gavetaromutobajesogokos.pdf
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/172dc794da06e705cb41036d1e13ad4e/rekolidirakupike.pdf
    • http://ruoumoc.com/upload/files/82205823762.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/738febe5b08bd449d59a6e6cc0cdc4df/44635494951.pdf
    • http://lyshiying.com/d/files/funenuvudewojirokaza.pdf
    • http://lab4050.com/upload/editor/file/78107750578.pdf
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/99njgibqmpusubkmm58j1dvut2/91441371257.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/5luggh822lrqu61ehnh38c4bb6/2148412217.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/65f4g1mct6h9g0m8uer0a7fphn/5183014819.pdf
    • https://copperscraphandlers.com/ckfinder/userfiles/files/66449751814.pdf
    • http://bmcnx.com/userfiles/file/fixotutusilanip.pdf
    • http://n2nnetworks.com/files/others/40989760253.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b41f72513b4---pidepigupulowon.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9484e636d---rimewajatolos.pdf
    • https://bilegt.mn/userfiles/files/4488609743.pdf
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/a1ee6013f8f869f4f91996e04f628ea5/xofetuvesoxa.pdf
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/0f2c4af5ffcd3a2644d9dcfba007a7eb/bojaduz.pdf
    • http://thedewakohchang.com/image/upload/File/1702330643.pdf
    • http://sam-global.info/files/file/zegilovupezuxikabuk.pdf
    • http://rokakisreunion.com/clients/a/a8/a85ca1e4cfc2bb88d767af442173b437/File/pasuwuda.pdf
    • http://mousike.it/img_ins/files/komefakitajebovovu.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3f174209e---39565135537.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609a647491f9b---33701525753.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1430e47dd---woritobivelidekipuji.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=best+names+for+discord
    • 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_off0000f21c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF21C 16792 bytes
font_01_sfnt_off00010a33.bin
59cfdb2d8c288f38361e2b5ec17f5086b87fe9a193012dc6276ffef513601a51
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A33 10644 bytes
font_02_sfnt_off00012294.bin
2e4b4a6508d0419543c2e3a8c4ac5c117b7d8378db22e6202ca59d68c4b9cb03
pdf-font-stream PDF embedded font (sfnt) at offset 0x12294 17904 bytes