Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa5962e9862de904…

MALICIOUS

PDF

84.6 KB Created: 2021-08-15 02:16:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b2763da8614d2344b0cdc4e45f1d88d8 SHA-1: 86af895efcd0c5ec200a9ed5384dab2057704d2b SHA-256: fa5962e9862de904f149ee1474dbdea1c18bc27845022b9fade109550dedeff9
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 of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/hih3jqpfk695kbhdb9edr2cvh7/demolatewoduwaba.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/896510e043a2f15827016b562ad9c0d9/keleremi.pdf
    • http://carroll1975.com/clients/4/4e/4e2b018d07aaa5a30c3e4fca1c7a8df7/File/5948608698.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9112bdb76b---52106997675.pdf
    • https://idd.no/ckfinder/userfiles/files/29046076551.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b3887bd23---korenato.pdf
    • https://perfecthospitals.com/ckfinder/userfiles/files/xiwofena.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc69125b22---29398884490.pdf
    • https://iwanbim.com/userfiles/files/43708248919.pdf
    • http://podiummoda.ru/userfiles/file/37643920565.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/keup7kurhmrchlcj9jqfis6b6c/puroponakil.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/tq56d001vi0vq97hql99bvpou5/51924743456.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/a92049d8185a8ff2d6e7e7c9b1186147/jinulezefezarafewotuz.pdf
    • http://bocghebinhduong.com/media/ftp/file/27360494071.pdf
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/072b34d92dbd99e3c893e82570ac4047/wuzepelajusor.pdf
    • http://vitalenzyme.com/uploads/fckupload/file/xapikivivegixopanimabir.pdf
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a31979b32d0---dojediburular.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/610138fc8f386ef3ffd8d06280c8d08b/84368532425.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/064b6b97fa47e586a2b0c9fda31d59c1/tumatunewosuwuwafax.pdf
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/adea118b75d42d5cbca48854ad8d62c1/3069779811.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/173050e123468f9961507cf9e90dc8f8/70745734009.pdf
    • https://bruceautoservice.com/files/file/podawebipupez.pdf
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/rugumoko.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4320c7976---95720853245.pdf
    • http://musicpark-live.de/userfiles/file/33417584793.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/83umn7td8e4qkasc114lg50ukp/kalif.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=how+to+write+a+thank+you+card+for+scholarship
    • 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_off0000e551.bin
0683ad0ec16d80ac2f62750483b854eb67bc97b59e2232d8bb2c20d072c1ad07
pdf-font-stream PDF embedded font (sfnt) at offset 0xE551 11100 bytes
font_01_sfnt_off0000ff2e.bin
516e5ad2006afdd58efba0fc2ff093c0f349d1fd96576bf1627ebe0599fd9391
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2E 16504 bytes
font_02_sfnt_off000129d4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x129D4 16792 bytes