Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeebaa1ce4b77ae7…

MALICIOUS

PDF

85.3 KB Created: 2021-09-01 10:50:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 59643d2a6c46e12cda6a3444e89a3a01 SHA-1: f084f680a65e49ebb60c34c9bd8d5eaa422b1e61 SHA-256: aeebaa1ce4b77ae74064234a5c6f4058cb5dad419e98ad31e6c344e33a15a195
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, directing users to numerous external URLs, several of which are hosted on compromised WordPress sites. This suggests a phishing or scamming operation, where users are lured to malicious content or downloads through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/33pbntbdfd01qcgggt0fp68s2n/banopuwosidovepuxu.pdf
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/deradulefunutigugumo.pdf
    • https://asztromiskolc.hu/ckfinder/userfiles/files/pakaboko.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b8b8b655c---20066080127.pdf
    • https://olterus.net/contents//files/tuvafix.pdf
    • http://lmyc.net/clients/875386/File/bipirobudifenenurun.pdf
    • http://twtipa.com/upfile/files/2021/06/23/83004489019.pdf
    • http://verynailscm.com/user_img/file/3592238228.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ab41q28dcjmjbs2tr0itbns78v/31532911414.pdf
    • https://ctsgroups.asia/images/file/tafurajutipotenole.pdf
    • https://vieclamkythuat123.com/upload/files/30650965344.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfafe8e3f8f---25700540861.pdf
    • https://bloomland.com/sites/bloomland.com/files/67328574806.pdf
    • https://garraldaarquitectura.com/garralda_userfiles/files/38343877741.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d615f0cad---xufewikejagula.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/893bde53099c1a01552d03a63744b3ae/72483694596.pdf
    • http://jacksonreunion.org/clients/71346/File/segiz.pdf
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/devefagagiluzawiza.pdf
    • https://dpengineerindia.com/admin/userfiles/file/41556352250.pdf
    • http://kiuruvedenlukio.fi/tiedostot/file/gufabidezuzobox.pdf
    • http://tyextractor.com/d/files/85128860336.pdf
    • https://personnelcle.com/userfiles/file/zatitomesifuj.pdf
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/duvibukegunogajef.pdf
    • https://uniqrelation.com/userfiles/file/58075626167.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=portugal+in+french
    • 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_off0000e766.bin
219192d210f80b8a03775b1e8152e85d04ad8571857d93cc59f466318b85eda4
pdf-font-stream PDF embedded font (sfnt) at offset 0xE766 10548 bytes
font_01_sfnt_off0000ff62.bin
707dddb2e04786239dd374777cd074738e4752a770b16d3e4dd9c5494b4bc0a9
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF62 18348 bytes
font_02_sfnt_off00012eea.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EEA 16792 bytes