Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e1a465298d3ef92…

MALICIOUS

PDF

83.5 KB Created: 2021-09-17 02:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: e866b10148ecd55ecc8b7000ed397a6c SHA-1: c3af347b20936b33bacb170d84742f280c4c09ac SHA-256: 4e1a465298d3ef9218dba2bbaae2f6a5a03b07e6994d37321bf1fc0c80b879fb
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The presence of numerous URLs, including those with UTM parameters, suggests an attempt to distribute phishing content or further malware payloads.

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://crewmak.ru/uplcv?utm_term=pokemon+games+for+psp PDF link annotation
    • http://hifitness.hu/userfiles/file/vuxuxiwudejumepid.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613c2db97d760---31944325533.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/76622714607.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/xovolozemor.pdfIn PDF document text
    • http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tonofujos.pdfIn PDF document text
    • http://mrtowing.ca/Lawyers/userfiles/file/96425224296.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/68509409238.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614050e3b92de---1175471023.pdfIn PDF document text
    • https://hirurgija.me/files/zelajaxesozumuvivodivaza.pdfIn PDF document text
    • http://malovanesklomh.cz/images/file/badewodujopin.pdfIn PDF document text
    • https://aalatour.com/basefile/b2caalatourcom/files/xosovovuvozob.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/86914605567.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/jakaribeganakuwuwibuv.pdfIn PDF document text
    • http://oprandi.it/userfiles/files/vuzogevokojalimedetelinud.pdfIn PDF document text
    • http://apsencollege.org/test/fckeditor/file/wofozusos.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/238d1f6cfa7c66877dbfdfcc9f49330b/dajopudimivuwoxakoz.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/dolalunibibebe.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140266d5ca96---86639160023.pdfIn PDF document text
    • https://pernambucoimortal.com/imagens/files/kixakifezanaxeba.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/f2c58b5abb79bcdc11d091f3c00ee60d/49293379813.pdfIn PDF document text
    • https://dmitrovka-zn.ru/admin/ckfinder/userfiles/files/93806995244.pdfIn PDF document text
    • https://lazerom.pro/media/file/kujalutomogerofalufere.pdfIn PDF document text
    • http://mdtrend.hu/files/file/pejapewemo.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/09/12/file/20210912_141136_145.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/xobumujunewigatumax.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_off0000e0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E4 18164 bytes
SHA-256: e686d11ce73aecf0d71db8c67c63e887d30ba7cea5dd268b57dda87aacb6d0ec
font_01_sfnt_off0001100a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100A 10560 bytes
SHA-256: ca6e028673733057823656f3ca7966084797cbe11be34ae8487990281bb42c7e
font_02_sfnt_off0001282b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1282B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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