Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30190e20b666595…

MALICIOUS

PDF

82.9 KB Created: 2021-09-19 21:20:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b807025164c7a95dc771e48fbb82506e SHA-1: c7e17d72a7a94e2cf833ffc004228f25daeaddb7 SHA-256: e30190e20b666595e2b99174d5b171e8a18f62c45b97cdef57259097482189ef
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and a link farm indicates an attempt to lead the user to a malicious site, likely for phishing or to download a secondary payload.

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 http://okna-stv.ru/userfiles/files/47913060496.pdf In PDF document text
    • http://vectorma.ru/uploads/assets/file/69659732778.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/m3qumnf9cpre94p1tdgvqi56bh/jebetum.pdfIn PDF document text
    • https://pepinieramontana.ro/ckfinder/userfiles/files/mabatesigi.pdfIn PDF document text
    • http://tatugigo.com/ckfinder/userfiles/files/66296801169.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/3034df9c47d21992c87058789952735d/wenefuvu.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/6f6f0e0fd2a9bcc28c8307804b25f6c0/47943551704.pdfIn PDF document text
    • http://officegate.biz/admin/fck_upload/file/79068580714.pdfIn PDF document text
    • https://estatecambodia.com/htdocs/cljr/data/files/41325767742.pdfIn PDF document text
    • http://chinazzjx.com/d/files/rajod.pdfIn PDF document text
    • http://nuovojob.com/userfiles/files/24188267201.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16141b357224a3---kinexemesipo.pdfIn PDF document text
    • http://steakpluspizza.us/userfiles/file/firar.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/jutagogudujigekerim.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.fr/userfiles/file/36938531083.pdfIn PDF document text
    • http://htwy.com/upload/file/towejeliwosikimakifebe.pdfIn PDF document text
    • https://www.piramideidiomas.com/ckfinder/userfiles/files/16540197542.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed3db9efcd---sigojavusapenolifitej.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/tofasuse.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/95178317447.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161471053d94c0---77583690054.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613508a1698bd---fiwuvigakenumujifagi.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/45124922292.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/wokezofubojufabus.pdfIn PDF document text
    • http://win-sonic.com/ck_imgs/files/40463081878.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=the+great+hanoi+rat+hunt+pdf+freePDF 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_off0000db4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f35f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35F 18756 bytes
SHA-256: 2b43f08aed737e621e9317b353c32438de86f9ea94724d601bb8454543912d9d
font_02_sfnt_off00012411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12411 10628 bytes
SHA-256: 2862ff2a22602552a731601ade5d2796b90db1caf2cce56e2e4981a25a837bce

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