Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0077a0807b8f1f6…

MALICIOUS

PDF

85.9 KB Created: 2021-08-18 04:27:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 58101ac008caa12ba3a07a4bd677d9a4 SHA-1: 9f8d3059fcdfea93223fce7222d8bcf1a06cd797 SHA-256: e0077a0807b8f1f6f7df1287cf08f44ac440047c0807cf0b6732e67a3c653463
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Several heuristics point to the document being a link farm hosted on potentially compromised or disposable domains, suggesting a phishing or SEO manipulation attack. The embedded URLs, while numerous, do not contain executable content themselves but serve as lures to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://palaciodelosnavas.com/userfiles/file/kuzerol.pdf In PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a71338e7153---18849779745.pdfIn PDF document text
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/31234449464.pdfIn PDF document text
    • http://amblesidewindermere.ca/fckuploads/images/file/67075994822.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/sutavijumotiridaje.pdfIn PDF document text
    • http://northcity.rs/slike/files/54164063005.pdfIn PDF document text
    • http://edukoc.net/userData/ebizro_board/file/jekefixarabonomiwozelidu.pdfIn PDF document text
    • https://istanajp.com/contents//files/31841716899.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608333a6ec611---67929841175.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0465038001623750982.pdfIn PDF document text
    • http://www.eau-msu.ru/ckfinder/userfiles/files/68245612372.pdfIn PDF document text
    • http://cp-tournament.org/ckfinder/userfiles/files/gawikidojul.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/f8a0a0065f292a8bc4cffa74ab70a7bf/wepugonigegusizexeluj.pdfIn PDF document text
    • http://orrizon.ru/images/file/fekuzorexawupipilus.pdfIn PDF document text
    • http://zamel2.pl/userfiles/file/2031879294.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/minimenokena.pdfIn PDF document text
    • http://vigova.vn/Images_upload/files/xopedadusupatuzegib.pdfIn PDF document text
    • https://digireg.ru/upload/xemenowubakefubotezokejuz.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/bv74cfioov3quqr45lqhcm3v34/3185428532.pdfIn PDF document text
    • http://peusch.lu/userfiles/files/derumipumiwomunolemisa.pdfIn PDF document text
    • http://smclassof57.org/clients/34860/File/vudujumekijekowudipef.pdfIn PDF document text
    • http://chinajnbt.com/images/upload/File/55914483796.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/34145915050.pdfIn PDF document text
    • http://93564497.com/userfiles/51649483807.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+does+baking+soda+and+vinegar+remove+a+splinterPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/remugowumedunasexodalepug.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_off0000ea06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001021d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021D 11112 bytes
SHA-256: a782107cb7d570fd606b5f12519fb46718f593761edde852ac862de3faa93cb3
font_02_sfnt_off00011b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9A 17180 bytes
SHA-256: cdd6a4344209b7dfbb95511bb0f624e38f655936eb74581ebf783633b4c920bf

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