Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0e46c1325bbcdf4…

MALICIOUS

PDF

91.9 KB Created: 2021-07-07 07:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8a0e343845bda6ab27afc68ae2311e00 SHA-1: bf4d83f034ae4e96842f665d06955339ae4d15f8 SHA-256: a0e46c1325bbcdf4e74027665e9eea1007f646dbb45465d9bac93c078a62aaf2
96 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs, many hosted on potentially compromised CMS uploads, supports this assessment. No scripts were extracted, limiting the analysis of direct execution vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 5

  • 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://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/94aee1e4f1514543d9b40959a0a46610/70466241625.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/0a56bc051d62b92b25e8808ee9060ae0/migapexowupapagemutelixub.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/cssta4valc6clqeis5ogm5ftvk/rijukumulovugarako.pdf
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/54c3a6vfmvg1j1afrta68p5rhb/zikomegasaj.pdf
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16083da6f11b6e---15383688196.pdf
    • http://grandchainfamilyfoundation.com/clients/85333/File/jirorufebuluxipexovewal.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/6khesk69j24u69dordpfgb6kmm/ziwok.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c1253e0becc---xagukopil.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160b12e9a3a400---kofawumixekibusulelawowam.pdf
    • http://marcth.pl/media/fck/file/seteguxuxabub.pdf
    • http://abwvictory.com/uploads/files/xogirivuxedanomasi.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/a5c07e25ae786b577d709455ba9d9b34/33484046754.pdf
    • http://yuhenganquan.com/userfiles/file/20210705150034_942796978.pdf
    • http://cottoneauto.it/userfiles/files/5693834093.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/5f4ff681bdf4b6bcac53e44a2a15a126/31275196284.pdf
    • http://project-lovcen.me/userfiles/file/gutuzutofese.pdf
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/eae751a9b369c3f3ce2bac76be4bef92/nidagabumavinidivev.pdf
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/nojg7j0gs84ocfcl4dg2kfbvnc/46708170839.pdf
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/jp97d7r7dnon734mn6i1t17ef5/tagudirorojatu.pdf
    • http://gapoom.com/upload/fckeditor/file/53242060157.pdf
    • http://asfus.net/virgsurv/userfiles/file/48903373725.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bf1618df6ed---sezepev.pdf
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/53524549865.pdf
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/2d842e564ed784645133080cc4ac3f34/pepiwuwunokejozaluxefamu.pdf
    • http://luingpyrex.cz/foto/Image/file/varotememivunav.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b55ee19d9fa---53500134098.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=one+day+more+music
    • 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_off00010667.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10667 16792 bytes
font_01_sfnt_off00011e7e.bin
205c0580aee5e0afda06b7e47719f8ed8dcb7088b810c81a320fddd65823e837		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7E 10624 bytes
font_02_sfnt_off000136d0.bin
d806700ce850c17a45e570401243c895a1c30f1af5f27cdeca9bda29f88cee81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x136D0 16804 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.