Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb2302b634bfa447…

MALICIOUS

PDF

89.1 KB Created: 2021-07-08 22:24:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 31e167827794234aab4058d4e0a1e5cc SHA-1: c2b8bf77467a20fb92127dec5479eacb511f21e2 SHA-256: eb2302b634bfa447b2d6ce2b4e23e8278bf82c6e74b2fff8e02ee021c26e0a8a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute further malicious content or phishing pages. The presence of external URIs and link farm heuristics strongly supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/1895aefc247c2b8a4e7dde74e38ddb0a/nezogezapipimej.pdf In PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160811778c1494---pojav.pdfIn PDF document text
    • http://ccsl.asia/files/12285552888.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/45404340162.pdfIn PDF document text
    • https://morabia.fi/images/file/48069520520.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/2l87ki9ure6c3e0t87587v56qmgn9mda/dosojibatew.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/sapegatepezumusi.pdfIn PDF document text
    • http://ambulatorioveterinariocamali.com/userfiles/files/62061702426.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16081a3da79f70---59927720779.pdfIn PDF document text
    • http://contactconfiance.com/files/files/zogutujanila.pdfIn PDF document text
    • https://ovalpolycoats.com/media/73233824257.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e57733891d0---nanap.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c54980be8d---75898762888.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/ronimurolad.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/30340281633.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/69363518633.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/6bfb457c0423a3764ba5e1a002f833d5/79246862057.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/f4c4e8e91b9592404d18aae5df8128d9/nukebuvumewivufif.pdfIn PDF document text
    • http://dafangtour.com/fckeditor/userimages/file/99036181231.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ecb2d11a0---jusizokafegekufuviriw.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f7dce24b6---sosilewekagozobixosifeku.pdfIn PDF document text
    • http://adainst.com/uploade/files/20210702120149.pdfIn PDF document text
    • http://helloshoppingnepal.com/userfiles/file/fimafetozod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+rotate+one+page+in+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_off0000f887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF887 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11099 17252 bytes
SHA-256: 4597816232268bdc8710e0c2033ebd0a90f049d2c7d1ee7f6d691da7c6f879e5
font_02_sfnt_off00013da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DA9 10536 bytes
SHA-256: 0d7040795d23c9e6c82c6456331628aa7f1768282c1216b2fe9bee39c50d25c1

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