Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb5fff243ff85775…

MALICIOUS

PDF

85.8 KB Created: 2021-06-29 07:03:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 24fb50b1e391f5a62ec70a25c75814f1 SHA-1: ba8cb7afe7b205ea521fe3bf036c6a2a346eafa9 SHA-256: fb5fff243ff85775a3f4122c59bb993f3b056e1e1cc1bbaa04c7941783c5c254
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting. The primary purpose seems to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://lawrence-spruill.com/clients/42275/File/femagapirulinegasimevaxov.pdf In PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/c16e3lv371v0l6ibrd18gf2ic2/93906011920.pdfIn PDF document text
    • http://nhadatv.com/webroot/img/files/3745775073.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a6a16ff7f---siwozofabimijebotelof.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/04a5047e929d1b9d97ccf1e0af56c663/melogabu.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/38d79af4c1ee9f04430c4100cba8d738/vawigiluvixerapovoxul.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/nkt3djhsp3sdl9d5fpr5ktf6l7/jogagaku.pdfIn PDF document text
    • http://cainghienbinhduong.com/uploads/userfiles/file/fuxifijorebazifosukixi.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/7k035bsrc340c7nct98qfqgln4/49759432178.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/53f00e9d1ecbcc11c0c07f0a5116f60e/43986940723.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/99243796773.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/70996772961.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/22924333595.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160982cf825138---bodezalukotu.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/4761934c168a5494ae9ab5fa875f876e/64043582664.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/h1ee1qru8k7kba3n200d0e7mb5/vutitesijuj.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210517235345_ggaajf.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096d38dd902b---xonodakulizopof.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/sidukowesewo.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cf26764d4---zifuz.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/f72966108e32c51e900a1295e31f58b1/68049555321.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc66e7914a---tolomikizeninumuw.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d338b71d4d3---19586393111.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/82375178861.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=calcium+oxide+and+water+type+of+reactionPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90C 17324 bytes
SHA-256: 3a085a8b68b6041d65453ee8ab2f1a1cc2e649a198a3e3dad8d950129828d331
font_01_sfnt_off00011663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11663 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E7A 11048 bytes
SHA-256: fc98d69152aaa36ee80c9265aaa058030f850deed397adf2bcd0b281dbe4adcf

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