Malicious PDF — malware analysis report

Static analysis result for SHA-256 db20e3c066ff29b4…

MALICIOUS

PDF

76.9 KB Created: 2021-08-09 20:36:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1b0466b07f5d61036debceeed801e617 SHA-1: 803a74dc90b4f6a301d6d0bb5692ce35b8632e64 SHA-256: db20e3c066ff29b44b518b8eeaf8167e50074493b3ec19db544aeb630027d6fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://crewmak.ru/uplcv?utm_term=libro+wonder+la+historia+de+julian+pdf PDF link annotation
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b40c343d2c9---mopobugatozitiditaniw.pdfIn PDF document text
    • https://horkolas-gatlas.hu/ufiles/file/japaw.pdfIn PDF document text
    • https://reazfarah.com/ckfinder/userfiles/files/33374708950.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/97159636647.pdfIn PDF document text
    • http://janjoling.com/public/ckfinder/userfiles/files/60923096364.pdfIn PDF document text
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/fe60b566eab56f55edec9cd7067c7cb0/37037924200.pdfIn PDF document text
    • http://perfekttorun.pl/pliki/warozesudanofimu.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16094a5f649a9f---33305625625.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/44676708963.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec11881985---32067526304.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609c392b46682---63778490178.pdfIn PDF document text
    • http://hiddenforrest.net/clients/76790/File/56650914052.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/togaridelamazeganamefugum.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/mudowod.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1c5076aac---99904059399.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160909b0e047b4---mumabavugikugewukosawemu.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/608651a80d56f0e208bbf86679c4163e/13774615562.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/47322209520.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/5a72a4d0b3e7ac64339af2b524458462/75494605683.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/28918739388.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/28d93fd51d2c60dc4cf596b2b9fa2b26/zofufusigodegerakise.pdfIn PDF document text
    • http://aquarium-kochi.com/app/webroot/ckfinder/userfiles/files/74304908796.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/79519235540.pdfIn PDF document text
    • http://nessie-vinylcare.com/file/wanoxofazibuzowade.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/d422f73f907529fb3c8cbf13ab774f01/97674154823.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c68e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC68E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA5 11008 bytes
SHA-256: 12dbdaca90d45ccadef8aa1646e48867b40a2512bef2fab17a6da88e19361768
font_02_sfnt_off0000f7f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F1 16956 bytes
SHA-256: 30c697e4ee917d0c6dfd890d7aaf55d57ecc3b3aaadd1f9af7852c97aa1c086f

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