Malicious PDF — malware analysis report

Static analysis result for SHA-256 517f998329d0eeb5…

MALICIOUS

PDF

238.7 KB Created: 2021-06-30 02:06:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6ffafbd7dda20dde1d3c2422651672ac SHA-1: f3003571647170866f0d937fa59e55d2374e5023 SHA-256: 517f998329d0eeb540ed9779090f93f647b40123d9a2a740eaa71f5e3c843e0c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9850

Heuristics 5

  • 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.
  • 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://szsahsh.com/uploads/files/53946043254.pdf
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/827ddf38e2bff36e414430f8fc8fb921/74495940515.pdf
    • http://ciccioinpentola.com/userfiles/files/41876529501.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070a7063c5f6---bonepexupepalekoxuzokawu.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/23e0d0c9808f5cd5d960d05dfbe23b01/108721619.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9a0fb0282---6607359565.pdf
    • http://ibshop.gr/uploads/_uploads/files/zakijuzuni.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16073ee009a330---bulisifewexejotubozi.pdf
    • https://rajaketiga.com/contents//files/80577025158.pdf
    • https://tractorpulling-emmeloord.nl/upload/file/76381946780.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/2ad4a54007895224f68a5ee370135548/49983091102.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/33pirkj59sqjvbu22vc2n23p7f/mimuzasitupubigunuxovuve.pdf
    • http://babywagen24.de/userfiles/file/97683178563.pdf
    • https://securitydm.com/slicice/file/zenemajaberusakisiwaj.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/sv2pqsc3nnon8nacmcj4mdkn97/zuxapenipunu.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d503938072---33578721737.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d6771ddfde5---94138716771.pdf
    • http://caratow.eu/userfiles/file/7686600491.pdf
    • http://infinivideo.hu/sites/infinivideo/files/kapilafavuzisowukosajabur.pdf
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/7763f05bedc0b99d2b1323f15404fe8f/mulebomipazevosus.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1609e838e64a73---64280101338.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/f6d513790dfb23610929e110a89b0722/741287490.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607009e8b707c---66616619754.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087fa6146351---dololujijitunawegusig.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/3nbdmg774jrk3j9omb1kct1h95/wivujedofen.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca9454f0e9---pukakifavasegipujuronatuv.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=for+the+advancement+of+learning
    • 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_off00034dcf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x34DCF 16792 bytes
font_01_sfnt_off000365e6.bin
6f28b0721adfc205ba46fec4b91127f1db2d2062a2af3905180fd1221bf73ff7
pdf-font-stream PDF embedded font (sfnt) at offset 0x365E6 10800 bytes
font_02_sfnt_off00037e57.bin
9eaf736cf822b5be87a85ab2a6acebee8d020d9a58e4b10a2178cde58ce175df
pdf-font-stream PDF embedded font (sfnt) at offset 0x37E57 17696 bytes