Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cc03613be0cbd4f…

MALICIOUS

PDF

90.5 KB Created: 2021-07-27 00:33:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 216629c1a3867c8fd1a776efa160153d SHA-1: b3bbd95448ed878e54bf549a67f33ef33a93b53a SHA-256: 2cc03613be0cbd4f31df4e096aceb6a255aafa3f55df34acf80528df28848fe1
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 functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable hosting, likely intended to redirect users to malicious content or phishing pages. The presence of multiple external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate a deliberate effort to distribute links for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9744

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://mldom.xyz/web/img/podborky/files/seturofatomome.pdf In PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/f563f54de4ead99704f279caffe7212b/zadezuvafixogubogujo.pdfIn PDF document text
    • http://cosmik-kino.ru/sadm_files/391953760.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/054b9ac236d5524ae1bf8911873e5b2f/23636137283.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160848f85d31cf---98568366330.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160b731b21db64---renet.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/6m94uajam4fc9idtpoapd06bh7/rovuborubikuniduf.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/4de6d6a6b1418eade8efeb65a3ae92a3/53617660722.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088cd9b803a0---47970210214.pdfIn PDF document text
    • https://ruxthai-guesthouse-chiangmai.com/ckfinder/userfiles/files/14780770439.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/sawogumemopesujukatage.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/bowibupaxisivoramaratopa.pdfIn PDF document text
    • http://veronikavilla.hu/userfiles/file/14438534384.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/bf16e1155430dc2b56ec1c7da41778e0/fekiwemajok.pdfIn PDF document text
    • http://www.northern-japan.com/image/upload/File/tosiranoradasipugokexev.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160856a0d80a2b---60574231097.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/wiwadosekawetakofukimi.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/gnnkfmvilkf2ksqa6npam3kvob/vafewewakejezoxafe.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/b5j1bag5qd2nev791sjorcse02/buzofa.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/17708434334.pdfIn PDF document text
    • http://kamkmori.cz/ckfinder/userfiles/files/mozulunefez.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16070c71109d4a---54664784172.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609439c2a7d7e---bamixinelobez.pdfIn PDF document text
    • http://herculesestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tovawasox.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4e3463049---muwezojiforiratik.pdfIn PDF document text
    • http://ambvetesopo.eu/userfiles/files/70530823565.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=descargar+cat%C3%A1logos+price+shoes+2021+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C1 16424 bytes
SHA-256: e18d6dc742fe41b6470c83276a17d8ab53ec178fdfea159b60d283ca24d0ec59
font_01_sfnt_off0000f857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF857 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001106e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1106E 11268 bytes
SHA-256: bf72a11d8a02eb9a1dbfbb83420cd67722e06052c97c7732f14c4a178234025c
font_03_sfnt_off00012a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A7F 18068 bytes
SHA-256: 79194b2ef7c880c5dc862547a5899474bbc92ccf580786d75dc0a054f4bc979c