Malicious PDF — malware analysis report

Static analysis result for SHA-256 00e8b5ab158e9341…

MALICIOUS

PDF

84.8 KB Created: 2021-06-27 22:36:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 57c2316b156be5253530208d402f93ef SHA-1: 51de3b50bf687103e6cdc6bf3441ce9ba58fb8b1 SHA-256: 00e8b5ab158e9341e70f0449c369f386f55993b48eb92dac44ce1fbee77397b6
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of links, many pointing to compromised CMS upload directories, suggesting it's designed to lead users to malicious sites or downloads. The PDF itself does not contain readable content, but its structure and embedded links indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://architects-desk.com/uploadsfile/86213539024.pdf In PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/db9a5ab200ebcd38e1197b1c3adb0e22/betup.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/8d2e95aa7a3c37771e8f88867132aa6b/zoxipaxenalajexiviwu.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210508184551.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/909j9ol7uv9m6v98dfpvklgsm0/zasawokewisovuguvoler.pdfIn PDF document text
    • http://alliance-vietnam.com/upload/files/28763705253.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c5777cc1e---47813229408.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/8d4dcb1cbdd9933b3013c07766006f24/fodevulatudigereb.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d1d60c7a0e8---26196813370.pdfIn PDF document text
    • https://istanajp2.com/contents//files/65238659685.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/dd74f6804c52b92efbb9acc6f34419cf/pozitoru.pdfIn PDF document text
    • http://unternehmensberatung-hegenbarth.de/userfiles/file/95656689255.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607088aee7637---jipokowawufi.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/miwuxabipobuf.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/43930711954.pdfIn PDF document text
    • http://massageindex.nl/images/uploads/lobisobunu.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1606f19742b91d---70875326393.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d37d71825ec---20476189121.pdfIn PDF document text
    • http://bichvan.vn/upload/files/47432307388.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3437921a6---98284901952.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b590da53d---nuxadatulibemejodugi.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/tuxokesotedotazuzow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=general+chemistry+quiz+questions+with+answersPDF 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_off0000e64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64C 17404 bytes
SHA-256: ceaf09df233d6f5c2dfefb2514efa9eb3eb01259c5e567c8e3dedee8e0dcaaec
font_01_sfnt_off0001142c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1142C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C43 11040 bytes
SHA-256: 067cffe7ae5ce936bc60c46b7197a24ba1cff10e3967da6a28c7b91915970f0f

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