Malicious PDF — malware analysis report

Static analysis result for SHA-256 466ea4f50d1ccbfa…

MALICIOUS

PDF

221.5 KB Created: 2021-06-26 00:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 48f8b818b9fadbc0090e3bd4777dd641 SHA-1: 62c345b4167801642ab983ffb18463e970165490 SHA-256: 466ea4f50d1ccbfac300dcd726c2e61e34e2a39d0573cafdd291514eacdad51e
126 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains numerous links, many of which point to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content. The presence of these links indicates an attempt to redirect users to potentially harmful sites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7423

Heuristics 5

  • 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.
  • 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.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160752d2dc7b0f---59956731003.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16083355cc13af---susozanito.pdf
    • http://gocreate.termall.pl/upload/fck/file/gotitagu.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607606e632f8f---puxenoxene.pdf
    • http://sushiloverca.com/uploads/files/tekenisivajaraviluwebimo.pdf
    • http://abogadosaguilar.com/ckfinder/userfiles/files/pokimazojenunizoxevi.pdf
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/8c01a9fbbc406b257c584ba729184d5b/6467810099.pdf
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16071bd4d88b8e---47816888626.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/4nc9sh5b1ctv6gohq0fho5q950/tufofizopuzewuminoluda.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160baaa5ab60be---terafebu.pdf
    • http://proxima-design.cz/files/file/welutifud.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a35997c4ede---89306343960.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/c7cf5b67eb37954b19c0a3cd8972833c/17829742770.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bf9b888e4---jiwubuvazen.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5e5f7ed59---90133615754.pdf
    • http://iccj.jp/images/uploads/fckeditor/file/jogumufijadaropemika.pdf
    • http://ridendo.cz/files/file/60758906964.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/dd1b99a7c9f556cae3ad28e0e6ec4ac5/21508513315.pdf
    • http://okulsanmalatya.com/imgup/file/lisofasagul.pdf
    • http://kemmurad.com/webroot/img/files/98909435363.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1b095a325---65938499478.pdf
    • http://kochamsushi.pl/UserFiles/file/dobikorufuzufema.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf82ae18c57---29272424940.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7b2eca638---letebibowesenugetom.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=word+to+pdf+online2
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000135d9.bin
39d5b504560c8bb216baf9405907b7c4e691e05c71aca570c7113f2f5034c121
pdf-font-stream PDF embedded font (sfnt) at offset 0x135D9 17416 bytes
font_01_sfnt_off000163a0.bin
2baa67214d45373263e722d7bac48f8e2fb9a1543e8daa59c42f7c842cca27a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x163A0 17068 bytes
font_02_sfnt_off00017b53.bin
4a7f7ea46262d1217b1aee1a2df4cd50a46d5f8cb0a417a1572e882b2e0b294b
pdf-font-stream PDF embedded font (sfnt) at offset 0x17B53 177960 bytes
font_03_sfnt_off000335a0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x335A0 16792 bytes
font_04_sfnt_off00034db7.bin
22a22714532eaf306841b737ca56900556b62396ef5de0d4c5dc4d8e884d9f35
pdf-font-stream PDF embedded font (sfnt) at offset 0x34DB7 10276 bytes