Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30993396348f753…

MALICIOUS

PDF

81.5 KB Created: 2021-09-19 12:58:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 598741ca0347258b70a31fd264e6fa91 SHA-1: 02bfce0ab530576225a25f7e3b37fb9a9223364a SHA-256: e30993396348f753f31a929805442ac77bb67a26454d39a9b599cce81f181cca
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Numerous heuristics indicate the PDF functions as a link farm, with many URLs pointing to external sites, including those hosted on compromised WordPress installations. The presence of multiple external URIs and link farm indicators suggests the primary purpose is to redirect users to malicious content.

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 https://pixomot.ru/uplcv?utm_term=game+candy+valley PDF link annotation
    • http://www.madiran-cruduparadis.fr/ckfinder/userfiles/files/vexomabowidimodavirasag.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/46973471097.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/83272806630.pdfIn PDF document text
    • http://porpora.eu/imagenes/imagenes_contenidos///xuvebupo.pdfIn PDF document text
    • http://kprmk.pl/userfiles/file/koruwonisebotirowu.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/15123151939.pdfIn PDF document text
    • http://jnmindia.com/outscapes/admin/ckeditor/uploads/ck/files/gazebebagerazabube.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/gopevipar.pdfIn PDF document text
    • http://namjapizza.com/app/webroot/files/27003791499.pdfIn PDF document text
    • http://ahppesticide.com/userfiles/file/zizume.pdfIn PDF document text
    • http://fernandopelosini.it/userfiles/files/ruvalonavevod.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/161421fcb074e3---30105885229.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/161425689909dc---xoxulifarika.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/srq4l47o256s7q7pcp5ktlg7je/86250044390.pdfIn PDF document text
    • https://mylin.in/ckeditor/ckfinder/userfiles/files/32602954397.pdfIn PDF document text
    • http://www.heksan.com.pl/file/fabenixedogugojuzilu.pdfIn PDF document text
    • https://uleiuri.ro/userfiles/file/78786027189.pdfIn PDF document text
    • http://olympusflights.com/files/files/jifufezagavevazipej.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613168f5aa9b9---1014403412.pdfIn PDF document text
    • http://lakesnwoodskerala.com/uploads/file/65999521875.pdfIn PDF document text
    • http://alrehabourhome.com/userfiles/files/mozojaguravabuliveb.pdfIn PDF document text
    • http://www.gitialiganjlko.org/ckfinder/userfiles/files/lelur.pdfIn PDF document text
    • http://pcccmiennam.com/media/ftp/file/28122129009.pdfIn PDF document text
    • http://atreve.eu/ubezpiecz/obrazy/file/wakepoduvelexuwu.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_off0000dab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C4 17932 bytes
SHA-256: 9eedba972320903f88f9c4df2e5659a40cea07dd99fbc3e3425aedb9cd24d95e
font_02_sfnt_off000121a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A0 10172 bytes
SHA-256: e6577ab80352e72e54aa4b53714bb5984f9d6be1f79d179414519b98b4b0315b