Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcb02e44db7f34bc…

MALICIOUS

PDF

86.4 KB Created: 2021-07-02 06:58:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: f3b093c3b422d7da4e0a702c5a2917f9 SHA-1: c5659a51aa82dc228b96711034dad7d42c4f942a SHA-256: fcb02e44db7f34bc916f27f284d385c8ea326b4e97468b0fc269ad61204c8544
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a phishing or trojan payload. The presence of multiple links pointing to potentially compromised or disposable hosting, along with a 'link farm' heuristic, suggests an attempt to distribute malicious content or phish for credentials. The embedded URLs, particularly those related to formcraft plugin uploads, are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://diysmart.net/userfiles/file/23547775242.pdf In PDF document text
    • http://cablexconsulting.com/Upload/file/xemusot.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/3562661349.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/luxodu.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop//contents/68690172084.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/3834089888.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c592c40d29d---kopojavewasanapufepub.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd99555a94---60527844148.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607abc7d81f4c---18565506954.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3507b1100---wegudatigatekegebifixit.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/neniwesadodovoxe.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072f1c2d7a51---45365926373.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc9aaa0cc3e---93506862729.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4556dd330592af8560f9c5450cd3c8f4/galatedapivaleruxipoze.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/cb0e380c7451dc20b03c63b52e511b4f/kabadurodugugel.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/poruxirujakaxodol.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb27a1a3384---pekujodubuzuzunavula.pdfIn PDF document text
    • https://juvelyrikoscentras.lt/Files/file/rojupefopejeze.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608452006f5bc---mesofibitagomakivowi.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a34b8d6a9---nudodex.pdfIn PDF document text
    • http://chroscina.com/userfiles/file/wuvakefebamisawopobil.pdfIn PDF document text
    • https://yalcinplayer.com/calisma2/files/uploads/xetifilozodopidawotek.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/sanumitasa.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9a886f4c2---titufene.pdfIn PDF document text
    • http://helpibr.org/clients/f/fe/feaff840d005acecac0f151e8679c8db/File/jodasetug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=tomty+gaming+executor+download+2020PDF 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_off0000ede3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE3 16944 bytes
SHA-256: 013403f98ed701abf22988625c9ee5cbdb7fa1edcae169161f436945d1618c0c
font_01_sfnt_off00011a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0F 11152 bytes
SHA-256: 1f21c6356205bb0d5672131945b11a8999abb255a3ae1647e665ec30953b2727
font_02_sfnt_off0001340c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1340C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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