Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4225d12a7cdf548…

MALICIOUS

PDF

73.6 KB Created: 2021-09-29 02:34:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 0d9d4db50b84f8f0845e446be22b304a SHA-1: 62dda14179758214bb570b9320668057c8c45710 SHA-256: b4225d12a7cdf548b4d180ab0650d4db39e35f2d950ad35247fbda456b271a11
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or redirection attempt. While no scripts were directly extracted, the nature of the links and the detection suggest it's designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://hoclaixebinhthuan.com/upload/contentFile/file/sajotunoveteduluvixisuma.pdf In PDF document text
    • http://brukbet.com/user_images/file/85427094720.pdfIn PDF document text
    • http://foodchemsino.com/d/files/tenoralus.pdfIn PDF document text
    • http://life-homeshop.com/asset/uploads/files/zofuzinenozugo.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/161528a2777983---kutixalaxinab.pdfIn PDF document text
    • http://alde-pace.org/ckfinder/userfiles/files/defuxigajota.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/f5dce463cf9fe2dd72f94036289c8358/jokezelakase.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/lajomudutinigifaroburij.pdfIn PDF document text
    • https://extremedriveline.com/ckfinder/userfiles/files/ginuwobob.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/17bbd82029c20aa8b0f7c10dab5de512/tebigase.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/mamomiwizufatubibip.pdfIn PDF document text
    • https://bloomeng.com/uploads/95154580980.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/pivepofetojotebazabakitav.pdfIn PDF document text
    • http://jonellchem.com/upload/files/nebulitos.pdfIn PDF document text
    • http://kayapalinakliyat.com/file/podizabor.pdfIn PDF document text
    • https://eventaipei.com/upload/files/53843616111.pdfIn PDF document text
    • https://jerseyshorepirates.com/userfiles/files/9992248937.pdfIn PDF document text
    • http://smirna.pl/files/file/fesukef.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/2u4uqkeotd2f7ikptrk30nq821/fidifuzo.pdfIn PDF document text
    • http://kythuatviet.vn/uploads/userfiles/file/sazasariwoleluxirefos.pdfIn PDF document text
    • http://anm-av.de/uploads/files/5095472132.pdfIn PDF document text
    • https://takipbizde.com/calisma2/files/uploads/60012212680.pdfIn PDF document text
    • http://msmzizkov.cz/data/dokumenty/mifekes.pdfIn PDF document text
    • http://crescentcarpets.com/userfiles/file/35856600984.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=cual+es+el+mejor+acelerador+de+internet+para+androidPDF 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_off0000b5a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5A7 18408 bytes
SHA-256: e9af1a18bac7ac26b20e0587300a70523558c0de23b1786b57ccdb358cc24109
font_01_sfnt_off0000e550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE550 10936 bytes
SHA-256: 221f6b064627ec15dabf7d9eeb72f5184e032a8dc3dfad8da02f97d2e38e2134
font_02_sfnt_off0000fe96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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