Malicious PDF — malware analysis report

Static analysis result for SHA-256 74cb0abffbbc0f73…

MALICIOUS

PDF

389.0 KB Created: 2021-07-31 23:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: d0a2f5d48f8138b9f52c987b875c40e8 SHA-1: 3e3660bfac0735bb3b9042cebfcaadd8eb05314c SHA-256: 74cb0abffbbc0f73b432a8e916c631f18e2cb6f85fc4e75c312cd3c3cf127f2d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous external URLs, including one pointing to a compromised WordPress upload storage, suggesting it's designed to redirect users to malicious sites. The presence of external URIs and the compromised CMS upload link farm heuristic strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8227

Heuristics 5

  • 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.
  • 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://chcial.ru/uplcv?utm_term=oasisspace+aluminum+rollator+walker+manual PDF link annotation
    • http://vitanova-cattery.com/upload/file/jetabososuridat.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/sezerisufolude.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/13927921110.pdfIn PDF document text
    • http://jarosi.hu/files/file/pojoxolasojasel.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f72c9873d---56093243330.pdfIn PDF document text
    • http://szentistvanpatika.hu/upload/file/6790156698.pdfIn PDF document text
    • http://csc010.com/userfiles/file/20210627051954_tciiro.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/d61ebe9c0208682e25ccd085d25a2df1/xurorotabelokaji.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/02ec9bc8d1fae9a447dff452b67aecd6/78841634557.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/e7f56f5bc49f1963db8cb2acaf60ff67/1980810907.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160b450fe11bf5---xutomezabojezekidozigo.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/wegatiribula.pdfIn PDF document text
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/buribuxivudoduguvepa.pdfIn PDF document text
    • http://scro.ru/pic/file/raviguroxakiwogegix.pdfIn PDF document text
    • http://r2doodles.com/clients/4/4a/4a4ed909dcef54c1e3ec6a0ce1d29f2d/File/52297216303.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607b65d328217---14753447666.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160bf3ce625aa2---vopamelamaf.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/d8a280e471092b4c25f24ba34429428c/33623965219.pdfIn PDF document text
    • http://trendybiz.in/usersfiles/file/62330324493.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088bbf0aed44---50724237692.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c79ef361a5---61409220617.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/2105191938291864640twpmr.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/21593903496.pdfIn PDF document text
    • http://rld-carbon.ru/file/fexoborikag.pdfIn PDF document text
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000576ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x576AC 10840 bytes
SHA-256: 2fa592013556f62ea855d2718425fb808733a9216813d6c2732f6edae432daa5
font_01_sfnt_off00058fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58FC2 1668 bytes
SHA-256: 0a4af374cb035e676210909e4790276a619635896d879aefac6ffd5912e9aefa
font_02_sfnt_off000597b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x597B2 21168 bytes
SHA-256: c948e0b1cdca55233f20ed36f89f21f2eeff708380a19864bf7b7c86c99dc12b
font_03_sfnt_off0005cd5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0005e56e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E56E 18828 bytes
SHA-256: 638718cbd7036830a1e4c0f485f6ff27cfc047a0a4d436341ee59d320c5e6c80

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