Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f98f6930a327e59…

MALICIOUS

PDF

84.6 KB Created: 2021-07-06 14:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 04bb8ef2ef5418d52ae93321d2245cfa SHA-1: 9a7372b7255f5c7b8148970ccf03d1e227e7b859 SHA-256: 3f98f6930a327e590f8cb2317b15c21753b21ef562a4e87c4e93252b15ec1d4c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. It contains a link farm pointing to numerous compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3238

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://archism.ru/uplcv?utm_term=business+plan+about+poultry+farming PDF link annotation
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf7dc13b2b6---28086835134.pdfIn PDF document text
    • http://basaritarim.net/admin/editor_resim/file/29215844210.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/h5vnsttr0hrencq9knjoid0mu6/sujisenufumedetugokabukuk.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/061ed2398ef42454c1eda78c62b7f570/27360445496.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/1ehuubruofajcl7veifinr4hpi/20410743237.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094cb046ebb0---72376958922.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1608cda8b8f2bf---6201663957.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a21ea826fdc---80333836331.pdfIn PDF document text
    • https://yar-net.ru/userfiles/file/67678098549.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/42b25cd59aca345b9197b29a4171eb55/gavoluvaruririmezarafur.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb3afdc9d8---55306992840.pdfIn PDF document text
    • https://seikico.net/img-tym/files/65458975774.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/simizonewanilofajuzidi.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bff37771e80---juredulotopomap.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/17402798435.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/qd5e0jhb4ujqucjc47ukfb8q07/vazuzinufivenu.pdfIn PDF document text
    • http://chronicles.ae/userfiles/files/nuvaragomif.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/a1332b68c6df9f97d1c7b22edbd479de/23369077928.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bde2697ec3---duxogezejitudobolonijiruj.pdfIn PDF document text
    • http://fondationmonetoile.org/clients/0/0e/0ecfe6182781ff486fe5156d2e85c11d/File/27790958289.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/wugexolerobexama.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abcacd49056---xawiwuvewujexerosarixo.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/71468919142.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f42422f6d---74188749027.pdfIn 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_off0000efff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10816 11108 bytes
SHA-256: f8cbb3884d73dd816b2507046c3f038fa9e79a77b95957f1dd80aeffc81b693e
font_02_sfnt_off000121dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DD 16732 bytes
SHA-256: 29b6d000cf2ad2fc43c3b4b5f4f23fe02b9e728ab5263381c9c448554b991576

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