Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fb8bc32c6ec3dbe…

MALICIOUS

PDF

501.8 KB Created: 2021-07-24 01:51:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3a52c78023e23f33984f1baf3603a0da SHA-1: adc07c57c761c2e870504e47585c71ef7c5763a6 SHA-256: 8fb8bc32c6ec3dbebb996866478075a603f5c994c1ecc05bd562b222d524235c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a high-confidence heuristic identifying several pointing to compromised CMS upload directories. This suggests the document is designed to redirect users to malicious content hosted on these compromised sites. While no scripts were directly extracted, the nature of the links and the ClamAV detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7463

Heuristics 5

  • 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.
  • 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.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/3e03a120324b3022ae9435f0ba67033b/rupezeraw.pdf In PDF document text
    • https://hchoanglong.vn/userfiles/file/19764046152.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609a067eeb5af---mapenaku.pdfIn PDF document text
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/zajarevitomove.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1608413f143ef4---totefemopufanogi.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c95fd1a31730cd38b04e0b1b9023c712/nanusurokisi.pdfIn PDF document text
    • http://nordicaluminium.ru/userfiles/file/jejomezikulimi.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/zidasawoboniluxaz.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/a6c23c678b0e97f8efc6e9b8839ad43a/japodowagesekokizezodoz.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095ed8d554f8---48717819018.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/5a9bd96bf306bf86a6b05389615fb853/29082340028.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16090ae9f02290---21202402549.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/g1iuormgu5rb6gj3p627bev9al/bapovugig.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f635fe5db9---79329422416.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/93420370591.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/26203155034.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/6f512f3ef3d9de2b770239c71f7eabe1/ruzitakusezikibamelox.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160736f0450c2d---40791474110.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876d19117e7---69829057049.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/5aacaeddccefba7c63a4f788a830c5f7/5692702866.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/ha65rouf47bk5q0re1o5pi1hbn/fatezivetelimewiselum.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/745be92de2c64110f5fed688309be331/gawuwowuxexejiduku.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/98813068469.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16079ec012d51f---sinesozifaxosilip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=salud+prohibida+andreas+kalcker+libro+pdf+gratisPDF link annotation
    • 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_off0007580f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7580F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00077026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77026 11304 bytes
SHA-256: 5f003521b207762016681d50c614484a997c35cb93b8071d3c7adbb663d87589
font_02_sfnt_off00078a2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78A2F 22580 bytes
SHA-256: ee1cf7d5a4566f0c9b0fa98dfb92f301d938a1068c2cfb5451a3e91a24769783

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