Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b2d9b5b76e4eaf7…

MALICIOUS

PDF

71.4 KB Created: 2021-09-19 21:21:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b91b3a397efbb8a5014543d026e57b3f SHA-1: f2be44ea3da7d71c3dce79080448844bb71b5c31 SHA-256: 5b2d9b5b76e4eaf7ef2aa82af7fc74309ac753b6cbbfa8264df65728b72bbade
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://coretry.ru/uplcv?utm_term=life+like+watch+online+free PDF link annotation
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/5fc40b6ab58865719a35572b4b9c5ecd/gipubed.pdfIn PDF document text
    • https://www.lire-les-notes.com/ckfinder/userfiles/files/rakumima.pdfIn PDF document text
    • http://lumieye.com/userData/ebizro_board/file/maxobetagi.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138e0d85ebcc---2852163852.pdfIn PDF document text
    • http://www.jokilaaksonratsastajat.fi/file/gatojejafirenedir.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/75785037423.pdfIn PDF document text
    • https://marblo.ph/app/webroot/img/files/94803282711.pdfIn PDF document text
    • http://blccy.com/userfiles/files/pewijaverim.pdfIn PDF document text
    • http://crmloccitanecr.com/campannas/file/fepenulowetise.pdfIn PDF document text
    • https://www.blondel-bois.fr/ckfinder/userfiles/files/52382211027.pdfIn PDF document text
    • http://thuexedanang247.com/uploads/image/files/71283114575.pdfIn PDF document text
    • http://elpijisystem.com/file/fumejaledapizujo.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb2047d8bc---paxitogumajo.pdfIn PDF document text
    • http://styrexon.cz/userfiles/file/tasikadoga.pdfIn PDF document text
    • https://sakesushimn.com/userfiles/files/risulesujajoxutipa.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161318a7f49ad7---36231067301.pdfIn PDF document text
    • http://awfiowv.love-mrt.com/upload/files/tawetenofefuf.pdfIn PDF document text
    • https://xnkvinatimex.com/uploads/files/45228330588.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wujekivogodobudoduni.pdfIn PDF document text
    • http://www.hausbaumesse.at/ckfinder/userfiles/files/33850977784.pdfIn PDF document text
    • https://mogilew.ru/userfiles/file/dumososaniwit.pdfIn PDF document text
    • https://optimuselearningschool.aels.edu/learning/site/images/uploadfiles/13809849874.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613af5f71d402---wenefomavitemok.pdfIn PDF document text
    • https://hinodecoder.com/userfiles/file/nugutixelokunukafami.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_off0000b694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB694 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ceab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEAB 10400 bytes
SHA-256: b5ac2081c66903ca95a27e699274a6def356924e96ce766c835e90cbcb8e051f
font_02_sfnt_off0000e632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE632 16452 bytes
SHA-256: 175ee136cfacf30a1421abe9794bd2c8acd11f35af1503a702a25714c18a2ef4

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