Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b0e07c8269652ab…

MALICIOUS

PDF

88.2 KB Created: 2021-09-18 19:32:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 54d7e6755b3be85667735c8344d83487 SHA-1: 1167cbc5a94f9d2ff37b5abb81c286fdc73798df SHA-256: 2b0e07c8269652ab9fdc584a8b088933e3ddf6e930d96aa6d3e0f93bd559add3
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The embedded URLs, particularly those related to 'gta v free money drop', indicate a lure for potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161435e69a3d94---kejukomizenexobiravarurel.pdf In PDF document text
    • http://pamatudarbai.lt/ckfinder/userfiles/files/numorigasuxonul.pdfIn PDF document text
    • http://sxnqx.org/upload/file/Fl202109171247579813.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/35628712040.pdfIn PDF document text
    • http://tidomusica.com/uploads/files/202109120209412867.pdfIn PDF document text
    • http://w-w.cn/isee/pfm/cms/uploadfile/fck/file/rukibefipesonapelugatugu.pdfIn PDF document text
    • http://rockhousemethod.com/ckfinder/userfiles/files/75581164394.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/zoseze.pdfIn PDF document text
    • https://aspirecambodia-edu.org/userfiles/file/tubodozefixorerojigute.pdfIn PDF document text
    • https://textosl.com/upload/editor/file/lekudikigorimixozu.pdfIn PDF document text
    • http://goldmustang.ru/files/files/24080171400.pdfIn PDF document text
    • http://irvinenott.co.uk/ckfinder/userfiles/files/fedoxetuwapofawusopu.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/cfmfk707i8gsoq888dv5jka547/sotin.pdfIn PDF document text
    • https://floresdeserrezuela.com/aym_image/files/66249557852.pdfIn PDF document text
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/sidilunegojoxov.pdfIn PDF document text
    • https://wic-net.com/userfiles/file/puterujoniworivemasew.pdfIn PDF document text
    • http://szjwwj.com/userfiles/file///gelopujuwasexutogulonefe.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2d7de987c---xujugozeputitapunukukoto.pdfIn PDF document text
    • https://smgbid.com/ckfinder_userfiles/files/tabubutoruwir.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16145b2ad4cdcf---rotag.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bbfe91dcfa---xoman.pdfIn PDF document text
    • http://amdind.com/userfiles/file/mosobofejetagijobipazupi.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/48495161711.pdfIn PDF document text
    • https://fultoys.com/userfiles/23694704705.pdfIn PDF document text
    • http://www.pilatesyoga.hr/files/files/76775269777.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=gta+v+free+money+dropPDF 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_off0000f40b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40B 18184 bytes
SHA-256: 5b02aff1acb9b977658072c1bcceffbdedf5895d82b1c4708949c8e184a727d3
font_01_sfnt_off000122d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D2 10572 bytes
SHA-256: 2c6f96d917ea68ee14719376e260a9e789f6665b15769e96fc7711cbafe88518
font_02_sfnt_off00013b05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1