Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ca00bd2b8633bd3…

MALICIOUS

PDF

79.5 KB Created: 2021-07-18 10:12:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 96ff52d0649499326f9a354123dff43c SHA-1: e961299e6a450154ac92ea25f358f57f011a60ef SHA-256: 6ca00bd2b8633bd32c8bdcded2d1e97ecfeb693ed58b61e2494cd89b4e506ba4
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classification and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute further malicious content or conduct phishing. No scripts were extracted, but the structure and URL patterns are indicative of a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/dhu571cbfgkkbaa2vs8kuge0h5/54808563979.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8b47aa63a---31569168939.pdf
    • http://eastmoorclassof1970.com/clients/4/43/4343e427eb1b0a0668350338a4d6b623/File/10539100205.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/062mon3t0m3nmckcnapvl5naj0/53875921541.pdf
    • http://deurenhanger.nl/userfiles/file/fogogupekuzosev.pdf
    • http://christopherdallo.com/file/saxojigomiwak.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609646a3a7cdb---99277020208.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae6a1264a09---94290121984.pdf
    • http://dansensvenner.dk/imagesfile///zazitiveja.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/vcmhg8s3eiseinaogf5aki3483/rumuget.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/e4d7dd3790747d9010c585911956c785/ruxepovudazarugidipabiva.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16078688b9d08a---nudem.pdf
    • https://anfauglir.com/images/file/85380625430.pdf
    • http://beytarimcilik.com/admin/editor_resim/file/21223133459.pdf
    • https://actor-conseil.com/files/file/wixezinig.pdf
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/dg7pm1dnb7j1u12r78kp5ipvsb/90143807679.pdf
    • http://www.climatisur.com/ckfinder/userfiles/files/xiwodekenuzubunujefok.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aabbd5ea608---21165285337.pdf
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/0aa92ca601987b33216b9c1f6dd283c4/83935086606.pdf
    • http://oticonshop.com/ckfinder/userfiles/files/xowatizod.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755c380345a---73792732342.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a15ed156b0e---77156790852.pdf
    • http://wallacewilliamsfamilyreunion.net/clients/6/66/662ca4338cd1fa41fa93b88222973dc6/File/58501980129.pdf
    • http://jingtianlawfirm.com/images/uploadfile/files/gurejam.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=core+banking+solutions+pdf
    • 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_off0000cccb.bin
158d1694f2b3dc67224bb4a5974d3d192e090e34a934cb3d77b2c1062b898aed
pdf-font-stream PDF embedded font (sfnt) at offset 0xCCCB 19304 bytes
font_01_sfnt_off0000fda3.bin
58e2d8fa2038e62d8e5dffac6a093af566e05a1a3fa929e4940fa0c79bdcaf7d
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA3 11036 bytes
font_02_sfnt_off00011710.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11710 16792 bytes