Malicious PDF — malware analysis report

Static analysis result for SHA-256 2946c23fa232b268…

MALICIOUS

PDF

99.3 KB Created: 2021-07-19 01:14:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ae4918b1933c5f16ff521fe4e541e714 SHA-1: 74e59a23f7c3438153be56ac6f0163064f85fd86 SHA-256: 2946c23fa232b268c2f96b431ada01e4d2f6bc03b03f521c40e169f1f57fe54e
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute malicious content. The presence of a 'Download Now' lure further supports a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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://101doctor.com/uploads/ckfiles/files/60e0c7b26ed15.pdf
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/1177f86e57292ec3b34651c250bcc47b/tolesexago.pdf
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbd1fd28c9---vonabipukegevamimuzov.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/aie76mc66tm5cstarnd5932fqj/30238251898.pdf
    • http://shs1977reunion.com/clients/41590/File/wumuzopol.pdf
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/8361fe630d6c979c9b596d04ac1f1549/51089247118.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/i0d60a6nonqbcjt30a09ogec1f/kakigafer.pdf
    • http://duoctruongxuan.vn/userfiles/image/file/jamowedo.pdf
    • http://appartenvue.net/appart/upload/images/mukere.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a219823d23a---35509969305.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/683ad6950774133a288daec900f01cec/91743850485.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/fd15da19989c17d5ee3b9e644a1f0619/66164853855.pdf
    • https://nhorizontours.com/userfiles/files/86138484136.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/8f1b414f98b8ec0c68505d7973714d5f/44001956118.pdf
    • https://parklanehotel.asia/userfiles/file/20819677305.pdf
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/16074d32d7ebcf---patuxitasokinupepi.pdf
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eff577d226---38779261660.pdf
    • https://anpheatingandac.com/nbloom/fckuploads/file/mokazilegixifezaxapawovox.pdf
    • http://dieta-plus.pl/userfiles/file/69131953136.pdf
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/26de4efdf73d66e51d87fcb3b74705b6/92178282005.pdf
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/26109776845.pdf
    • https://tdfstore.it/file/19423788673.pdf
    • http://murphysbeads.com/clients/54316/File/40189643363.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/0d8bsdqr9dokf8o5c1njo8cl8i/kapezej.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608243a29bfc5---tepewirunifid.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c2ec8b9b7---susigig.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=piv+certificate+activation
    • 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_off00012191.bin
43aeb25364f0560b3ad43fe9453eb372f1133675dc7c93f78fdbe8c5871f0916
pdf-font-stream PDF embedded font (sfnt) at offset 0x12191 10180 bytes
font_01_sfnt_off00013885.bin
acaee3891535e48092297e9b869a1a15906131113a6b63b1dc5334421b87e2f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x13885 17720 bytes
font_02_sfnt_off0001665a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1665A 16792 bytes