Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7c12080115c5641…

MALICIOUS

PDF

99.2 KB Created: 2021-06-25 17:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d79096d48077aaed1205834bd4f7cb29 SHA-1: 3200803f2699f086f6a337dc132f1afdc4d97632 SHA-256: f7c12080115c5641274d936c0cc9d802455039923a0a96411c7026ad2aa8cb23
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting it functions as a link farm for phishing or malware distribution. The presence of these links and the overall structure point towards a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9862

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://irlanc.ru/uplcv?utm_term=feint+meaning+in+english
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/3785db3654741127dbdaf1b247d8c0b6/robibajezumibol.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/98d143b1baaf9347c0ae099c8aa5c3c7/madelaretuwive.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607439cccb786---nonalab.pdf
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16098f4173f9de---96632309092.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/e4cd6b40bf5ec31668c57ca5d7b2ecb4/mitexatinovoru.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/qb4mhg7qavd8e1aj1s1bsi8l8n/69598074230.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609cef45a76ab---59498285141.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/2cecd1b2f7b4205f3fceafe47a8305b7/xirisotidewabar.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/b296bb154cceb4edb3569d6271a8fee4/61697455142.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/ed5756be112993a911e2f83e6ccd138f/xodibolaliliza.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/bdca1f4b67aba1e332aff7653a895045/26150340301.pdf
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b931de20da1---rotojirazikelizararizik.pdf
    • https://tecnibat.net/uploads/archivos/39976429575.pdf
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/69ccf1858a3d9bdcfeeddc8d779b0531/deviso.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/01bc8b2a749370f250efad41f8ab65dd/6398277346.pdf
    • http://51-lq.com/userfiles/file///kesivowofepovaj.pdf
    • https://airflow-skateboards.com/upload/file/tusefinupa.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/a7b660e5c1d60fcaac21c2ed9dac855a/rajofutegibitomijatepuxov.pdf
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a967a37b5---papamowutokogeregomolu.pdf
    • https://binarbaidtrading.com/public_html/userfiles/file/guzovoranedovoxevobal.pdf
    • https://zanhotel.ro/beficientconsultingFiles/file/gafenivajukilijekuf.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000148ed.bin
d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x148ED 18328 bytes
font_00_sfnt_off0000ed08.bin
a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED08 3464 bytes
font_01_sfnt_off0000fa83.bin
0203b00e2e2dcf740d5e3ce712b5a2a91c5b67206b546f56ed736d1b1fcfb97a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA83 22552 bytes
font_02_sfnt_off000131f9.bin
ec5d356deca20ac618ec3a6d214d00d49f7562bc425a222bd0d5bf94acd570a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131F9 10312 bytes
font_04_sfnt_off0001668e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1668E 16792 bytes

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