Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce6afbdb0878ea48…

MALICIOUS

PDF

85.6 KB Created: 2021-06-25 22:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 48a9e25d98ec8204664387b920fea1e9 SHA-1: 812d21a01a5866b1d7daa6e627550f2546ecb319 SHA-256: ce6afbdb0878ea48c6af28f2d5188b2b0dc22d0cad619cc0941dc5ef4020bcfc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links to external websites, many hosted on compromised CMS uploads, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to deliver a phishing or malware payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.alapan.org/fckimages/file/26246970751.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/eeid07h1i7ftrb5mh4kr7art9n/71750653151.pdf
    • http://dchs1961.com/clients/871949/File/9602679399.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092d6193c0be---gajoxagedanejovebowamijuw.pdf
    • http://banghetretruc.com/media/ftp/file/60046543968.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/fa956a5264c4cc0d09c10b95df578cc0/95386185185.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070552f5a19d---fegajalokiv.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8c5637b64---zumojimetuxumagudetatumu.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/ddc0f0b5dfc83c4592fda4e6deb8e73b/34033501745.pdf
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/50a21bd09f3594c45e080011f50f6771/93021442417.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/21339c027ff78cb6693ccf8049566096/52448595693.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160884da6b931e---35711919018.pdf
    • https://immo-cjeanpaul.lu/userfiles/files/xoropu.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160745eeab1a4c---wenolofesilenodosi.pdf
    • http://jjmcp.jp/userfiles/Image/file/7669845490.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160d0646f133ab---98918584402.pdf
    • http://ippinnudon.com/uploads/files/borezufaxawolaxuzo.pdf
    • http://interiorconsignments.com/media/file/puxafomanonuxakakusiroku.pdf
    • http://alliusie.com/userfiles/file/23642193194.pdf
    • http://botosani.ro/img/uploads/file/15031018025.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/ag4kbuvar1mjcrgb48jupa66ep/56073133700.pdf
    • http://yogo110.com/userfiles/file/17035293769.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9d18fdcba923ebf7b9e96f42e3628621/mupimukibofabotezapidi.pdf
    • https://accuratesearch.com/userfiles/file/32988158589.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=step+up+five
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edc5.bin
3e5e1f096e2dcd5d04717e3b2999a01b0a35f649f313602bf9152623cb0acb3b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC5 17456 bytes
font_01_sfnt_off00011b68.bin
0d26b73585095a6a55fb3eb7e823f6320b4f756f5f606a14b593bcab9800b7a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B68 9892 bytes
font_02_sfnt_off00013165.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13165 16792 bytes