Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a19bf0608068488…

MALICIOUS

PDF

74.5 KB Created: 2021-09-07 02:50:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 26349f5881169f5067aa9a88b3b3758c SHA-1: b30b1fd0b3dbfca81f71fc99809c9c1735668ad1 SHA-256: 0a19bf06080684886e911f7a395479e42d9b8d35e2ae47b815aaed8a5d91ad92
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish users. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://oniceh.ru/uplcv?utm_term=energizer+compact+charger+manual PDF link annotation
    • https://poldercuptrofee.nl/site/admin/ckfinder/userfilesfiles/baborixuwuwuzedowedoz.pdfIn PDF document text
    • https://creativitagh.com/pevron/www/img/file/41781011192.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608a6546bf32f---18030133608.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/cdaf37d28353b4c236453ec07fe90155/pirobarobikiwopiv.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098f29fb35e9---xurideraker.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160789a3a232cf---44843386703.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/nufimerelebipoxef.pdfIn PDF document text
    • https://masini-de-ambalat.ro/images/userfiles/83406306711.pdfIn PDF document text
    • http://gesht.ru/admin/ckfinder/userfiles/files/11090684721.pdfIn PDF document text
    • http://jucal.es/images/file/rubemozukumoxita.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/balakuj.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/n15rfmn41va2mcbif7eu8jpl3p/vujimufelujepeburu.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/gumuvizubivarejakemipam.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607b40984f27a---48853928354.pdfIn PDF document text
    • http://kitpaisal.com/mypicture/file/92990758304.pdfIn PDF document text
    • http://bestbelly.org/content/files/files/kizorisuwumuvez.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/88216599896.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/54716719984dffcf17d3c24c1d936b73/42187690066.pdfIn PDF document text
    • http://bociany.sk/media/file/32371660089.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/f5tfcatleeeo3bf4k55vgjdbrn/48221300415.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/wevofaxaguvusudop.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/a6b4efa5fb4bebf29ff2107c3fce1b8f/bavurifogurobefasej.pdfIn PDF document text
    • https://tes-sys.com/uploads/ckfinder/files/20210904/16307643671362.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_off0000c12e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC12E 16536 bytes
SHA-256: c248e9cae75345b252b8bc5833613236e030318099a87f9de1214b15e0d12563
font_01_sfnt_off0000ec0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0F 10796 bytes
SHA-256: ab1fe9d624687a76983f2f1e985e13f6f6079644ebe89e1a01727796625ae788
font_02_sfnt_off000104bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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