Malicious PDF — malware analysis report

Static analysis result for SHA-256 e63269c29a89baf3…

MALICIOUS

PDF

111.3 KB Created: 2021-07-18 05:33:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b25aaba14d73bb29092a1fb0c15e4cbc SHA-1: e287504e803664b03270cefdf109925ebef1fdd6 SHA-256: e63269c29a89baf34b82e84820e763e8510bd93420a6826abcb8fb87cccf1fed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

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://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/0qqi3cf3orjgh3h8bduh657eb2/41022892322.pdf
    • http://luckdidea.com/ckfinder/images_store/files/tovofutijusaniwapexobavel.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/5biq88lgbq4dqja013om76fib7/54080880875.pdf
    • http://www.allatpatikapecs.hu/images/file/76952951213.pdf
    • http://ecovn.vn/uploads/news_file/metavululolitolemapinexe.pdf
    • http://vanphongphamhienluong.com/upload/files/34909143409.pdf
    • https://fablab808.com/nbloom/fckuploads/file/84044569082.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e3941537d---mixekugoworubevezogij.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/c85ca5db87a871df974e2dfc37a6ca9f/61772780109.pdf
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/ce0c0d35d04a699e0056d2a18111f604/wofuxogawibofinas.pdf
    • http://starinviter.com/ckimagefiles/10877749719.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9a4218802---1011976180.pdf
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/towirosiwevupenuxizudoka.pdf
    • http://agriturismolataggiasca.eu/userfiles/files/91964884495.pdf
    • http://kotolantopeni.cz/file/15785093071.pdf
    • https://duhocblueocean.vn/ckfinder/userfiles/files/kagajerifotiwomiwe.pdf
    • https://damiel.eu/userfiles/file/84675106810.pdf
    • https://www.edmcenter.xyz/ckfinder/userfiles/files/64418820167.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160871e1dab3bb---89768322192.pdf
    • http://mp-hd.de/data/aktualnosci_imgs/file/21030226277.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/1e513852c148ecd41a27eca08682ac92/jaladovorinurobafuvi.pdf
    • http://yacpa.org/yacpafiles/file/31958241131.pdf
    • http://myhomeinparis.com/userfiles/files/kitifujukegigi.pdf
    • https://strategieb2b.com/userfiles/file/jifofu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=bo3+zombies+pack+a+punch
    • 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_off00015169.bin
03ebc2a57d1731a7e8c8482bc25a5f84837fb55e274bc9607e427570b02df574
pdf-font-stream PDF embedded font (sfnt) at offset 0x15169 17428 bytes
font_01_sfnt_off00017eb4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17EB4 16792 bytes
font_02_sfnt_off000196cb.bin
3ce9c1d413244a2b9fe704ec8f7610d2d8ef20bfa98ffce9456c61213fbdc4fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x196CB 11012 bytes