Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0c2f780ba5bcdb3…

MALICIOUS

PDF

86.8 KB Created: 2021-07-14 00:37:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 58b7e0c398dd4ebf4b5a3367e7bd7a06 SHA-1: fa6580419356a59d317b1567e19b35e34b0a299b SHA-256: e0c2f780ba5bcdb364973c220e8bae2abf724ba8590cc2d073dec3c9462adf02
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress upload directories, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple distinct hosts and UTM parameters in URLs further supports the link farm characteristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ddffc0d07b---waxopeverozinad.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/f3789daa43d17bc36fc28b1582ffe434/56949127437.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a11aad4fe---97189535717.pdf
    • https://minegociomiweb.com/userfiles/file/nabapogoguf.pdf
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/bdn4lujb30h9d5s6sp9v13thj4/lefawosapiga.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f63341457---jotigogisazuwududowelunav.pdf
    • http://darstin.com/userfiles/files/dajaxapuzozupiwe.pdf
    • http://brownewingfamily.com/clients/a/a4/a4d7a48ed280e719b438ae57db99af5e/File/19269890668.pdf
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/b70gr0hbq7j75gmekfvd9qhnpf/xilapigaxi.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/62ba2d9bd76b1f8fc2c1e862ea220a72/75463905303.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ae4493aed---60793897458.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/1ndslrqujf6opchkp622fk439a/73243084982.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908566d5e2f---3548695225.pdf
    • http://altelaw.com/uploads/image/file/57300877045.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096fcdc2866e---tunaruvekesipu.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/fbfa15e225b8cbe68fef7f1da46d6558/pelogewiletewudakurugori.pdf
    • http://slsnn.ru/content/file/fetirezivakezo.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/u67t6kp9ohc3pgqm21svl2rq12/xoxigikavaduba.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16075a3bf3642e---39017951167.pdf
    • https://transport-vehicules.fr/userfiles/file/mivogizugo.pdf
    • http://madonnina.info/userfiles/files/fasibasarevubuzepawogopef.pdf
    • http://albino-pitti.com/pub_img/file/lazug.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/3n0b0d478r3c5qeg3tqliqn3u2/sowodunor.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=ppsspp+naruto+impact
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e576.bin
73c22c37b5a758c24ed2da1de311f8622c3ab11c1468bd56182b11ae08d4dfd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE576 2824 bytes
font_01_sfnt_off0000f18c.bin
6a88cd316d58b0592cb504ef1595b4fd56c80366cb0fbe662439e1f726080d9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF18C 10460 bytes
font_02_sfnt_off0001094a.bin
b5a12d3a029bef4d21aa3a9794cdb32d70ba6ea97d02d805e240e5a1b10264e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1094A 16948 bytes
font_03_sfnt_off00013565.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13565 16792 bytes

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