Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dd39fc7a3bf44d0…

MALICIOUS

PDF

85.1 KB Created: 2021-08-17 13:10:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 08fd68f7634ab99ad4060d64254c0cbc SHA-1: 20bd37bef75f585c625ca7e1167e67cadc31d710 SHA-256: 7dd39fc7a3bf44d096b8ff1316e59861f2ce81dd36a896d9ecb78ecf1cb0c546
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed as a link farm, likely to direct users to malicious content or phishing sites. No scripts were extracted from this sample, but the presence of numerous external links strongly suggests a phishing or malware distribution vector.

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://allytemp.ru/uplcv?utm_term=sonicwall+connect+tunnel+linux PDF link annotation
    • http://banhangcongnghe.com/upload/FCK/file/fisakedivugomagur.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1bf61a511---nuzevavawafiz.pdfIn PDF document text
    • https://bimstudioinc.com/media/files/48905005118.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/68705337306.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/vuvonigedafowunan.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/rilujivetafogikozatov.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/14017272210.pdfIn PDF document text
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/8rcn8vme49sf112lms45mkciqq/73505423148.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/39551880253.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/79516455191.pdfIn PDF document text
    • http://sehs67.com/clients/e/e0/e078d4d0076166a7bb489ca3b3a583ab/File/88910886112.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/31487477403.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/41k62cpqua626s30dnie2ust04/46059668665.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4aecde0c857488d6be141de0f4126480/xoxikowiwagekozebibe.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a94d7c39b0a---fazivobo.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/oanprbhc3aqlrg40738ohrsej2/86297141235.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/3d21fe9b3480ee9d14dc677ad2df6a64/72071510868.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/36f95aa3f25e8363a12adb7922b3081c/kuxugudumawilasiti.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608b28c9eeec7---gejizariwozigodex.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/58786779434.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/40558526570.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608978374a050---4862287448.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e0404119d91---lumivajolefosamiwepaguji.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e367922c84---poputomir.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_off0000e74e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74E 10320 bytes
SHA-256: 21c8c3283591ac67752782c68475a14ee43f7d0bd9dd0224d96b5fe47c47a70d
font_01_sfnt_off0000fece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E0 18060 bytes
SHA-256: 3a9704ad9fb7ac163f75e6212845535f79fc127faa2bc9e0821f546d64d88580

Open this report in the interactive analyzer, or submit your own file for analysis.