Malicious PDF — malware analysis report

Static analysis result for SHA-256 27ac7df9c270ac62…

MALICIOUS

PDF

97.0 KB Created: 2021-06-29 09:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bcbe690f3234886d2b4595586b80e2e8 SHA-1: e12894766aa5a43584de10fb02a11deb41524460 SHA-256: 27ac7df9c270ac62246cc541af24cc1ce0f3dfeaaa01a6c3d030ecdbd68cf8ac
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites. These links form a link farm, a common tactic for distributing phishing lures or redirecting users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/80cbf2b235ffcaffda01ce2b1eb0050f/90795213231.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/o92mrmfuje6ta2mqi2255i848d/lapivaxebosidewoduronunig.pdf
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210527185004.pdf
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/abec5f038aff589773182d05e918b17d/vesedexudovananavafagerex.pdf
    • https://www.nuyew.academy/wp-content/plugins/super-forms/uploads/php/files/b232586d7e618c6dce017f5918ed63b2/38741339805.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d2af9c088---5265310958.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb48f78439---vulepuwazigagiriseruxo.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/xavubizutukabajep.pdf
    • http://sincaremedicaltour.com/js/upload/16534571373.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a86adf143---50169991868.pdf
    • http://wksx.top/images/userfiles/file/zetidulujalubomunafu.pdf
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/dk79lhtejk709q2rtv87j2rb3j/likixuxa.pdf
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a16ac1d3744---80588512376.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/5768c219d671ece9d789a01500a90d1b/toxinadazesodunutuwe.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b275ea0a4e---wexiwoza.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a095d4b9141---zupasokafojagimafedifo.pdf
    • http://fructusartis.com/i/File/50878343267.pdf
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/3nhl97tcqtiuaupae9lv2h8q21/texukozo.pdf
    • http://lowdertraviscoats.com/clients/7/74/74ec8bd2877f4db8d0b9f56bae0111c3/File/lopumeb.pdf
    • http://amuseonline.com/absite/userfiles/file/lurukafawewapu.pdf
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606c98e131765---83032289048.pdf
    • http://onlineexpert.in/userfiles/file/wofezokoresager.pdf
    • http://evevoyance.fr/adh/.-/file/sokubarukajamadomerurote.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=justice+for+all+walkthrough
    • 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_off00011922.bin
77ae087ab27fd66dfb4a0a8fd3d609f1f80563e6e41e0dba9b27a9ee93dbbc1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11922 10780 bytes
font_01_sfnt_off00013241.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13241 16792 bytes
font_02_sfnt_off00014a53.bin
9460cf50557bb236f807d9c221b933b976110eae54a27a5f0070c970fd9d77bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x14A53 17148 bytes