Malicious PDF — malware analysis report

Static analysis result for SHA-256 775c18f01926c48a…

MALICIOUS

PDF

98.0 KB Created: 2021-06-28 13:37:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 416eb8fdc29cbcb79cd9c14bff2d78c6 SHA-1: 22b14301cfafc2cf954931116dd6701d87c1ff06 SHA-256: 775c18f01926c48a2b5626454693d1745b3cce524c626d5a13f95deffae58e12
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or conduct phishing. The presence of external URIs and link farms indicates a lure to external, potentially malicious, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

Heuristics 6

  • 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.
  • 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://crysiq.ru/uplcv?utm_term=alita+battle+angel+full+movie+download+in+tamil+dubbed+isaimini
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec504bf94c---19068033178.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/448888c6810d1b69f5e64f468ccde5fc/fudox.pdf
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/regumalebufegal.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607533028a1bd---74610618616.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2559b6b896---sogedozipexavifezidosu.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096cf634bcd9---madagigila.pdf
    • https://acavacecio.it/userfiles/files/33700121316.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/bt1h4qd2rnk67nqomdggtfn5b1/86021436805.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095bb5b6e3b2---93755336279.pdf
    • http://danies.ru/ckfinder/userfiles/files/genisesawezasigasara.pdf
    • http://chronicles.ae/userfiles/files/70752412020.pdf
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/dq7kg713t5nfoo1ugg1j04kod1/pufus.pdf
    • http://debandhelder.nl/ckfinder/userfiles/files/rubegubuwewopilibadidaza.pdf
    • http://ijdssymposium.eu/upload/97142380574.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751bd5e5186---xebevojojoma.pdf
    • https://motelandratecuci.ro/userfiles/file/gobivogib.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d1d122393---59697741377.pdf
    • http://narnivet.com/userfiles/files/jibagodajujoruni.pdf
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/6ecce8bbff2d1a3f99cffe25d8d543b6/95972047695.pdf
    • http://stylekd.ru/files/mosomorimotowaremudonosik.pdf
    • https://aprilboya.com/userfiles/file/nubilumuluwinebisesu.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b0f08ac8f---7251018983.pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/a985a3a30ee9cf20fc06965ecc51bd72/xabejujadivijobemusofov.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcf0.bin
f62cd4a20aea5945885ced786dc0e9f3807131b4e94f04dbd92c1e8c4e271c0b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF0 10968 bytes
font_01_sfnt_off0001164c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1164C 16792 bytes
font_02_sfnt_off00012e5d.bin
fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E5D 16144 bytes
font_03_sfnt_off000143d8.bin
472257d766f24556f61ac7015ad434d37fbc9e5e21a117f8e58b028412d3b487
pdf-font-stream PDF embedded font (sfnt) at offset 0x143D8 21104 bytes