Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6714c982a7a4885…

MALICIOUS

PDF

96.6 KB Created: 2021-09-05 22:06:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 33033b2e7509b2219df81bfb9b1a8689 SHA-1: 10f623f531d342ff3b6a4ff7697f9e5e694d7bc9 SHA-256: a6714c982a7a488504a7e9cee73c5550a96840cd78b461941503bfc8de17e0b0
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload storage, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted, but the structure and URL patterns are consistent with phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ce3b0062393---15767092102.pdf In PDF document text
    • http://www.sanjuktabanerjee.com/fckimages/file/rokenowedubenakaburuwov.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/20204139111.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/monemuzas.pdfIn PDF document text
    • https://koparieshorvathbusz.hu/files/file/46792196700.pdfIn PDF document text
    • https://serpavenger.com/ckfinder/userfiles/files/zoxawexupowuvifar.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16114ed837e334---bunevasiga.pdfIn PDF document text
    • http://rosniyom.com/userfiles/files/93065322438.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095390934d16---gesovotaz.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16079b413a7e7a---91222709082.pdfIn PDF document text
    • http://usmleworkout.com/files/file/runibumugi.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/b98fd7c7e3e8ae77f8d9dd2fc2bf66c7/motakow.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161182b62e8dae---6648823113.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16128d7e42bed6---88252110966.pdfIn PDF document text
    • http://boldino-hotel.com/ckfinder/userfiles/files/gavaxapebiwu.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/80666849696.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160debfb816e00---wawuper.pdfIn PDF document text
    • https://ngusacdon.com/upload/files/jepaxele.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606cebc0084b5---sigubolufelerusojekeralen.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/vimeguk.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ece96a3f76---67629013110.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=ejercicios+resueltos+de+maximax+maximin+y+minimax+pdfPDF 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_off00010b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3A 11208 bytes
SHA-256: 9a381212cf4575fa0dfadc708703e791e6780a260088a6b1899f10b2d5128999
font_01_sfnt_off00012571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12571 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D83 21544 bytes
SHA-256: cf81e03601b2e273c0e7e5cbb4e81c5460e2b1c3fbaf4fd1fb8d1ae018433119

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