Malicious PDF — malware analysis report

Static analysis result for SHA-256 47edaf045b7b448f…

MALICIOUS

PDF

91.5 KB Created: 2021-07-19 21:52:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 21a4ef03d8fca18cac3dada3540ae8c2 SHA-1: ad892502a93af9e52bab24bc37b1b7b046c7a1a6 SHA-256: 47edaf045b7b448f445b28040fa9c443e621a93e60d3c6a88615a3a084f3b98b
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL analysis indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lomepebuxo.pdf
    • http://www.oomedia.com.tw/ckfinder/userfiles/files/mefajibewumipoj.pdf
    • http://writtenmail.com/upload_images/file/koriduxulojejida.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/443e236a229d0f504d93c0d88f167f97/51766037486.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/3lq3l246el5hk7kmulcctt7f68/nadukufigewifemiw.pdf
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/molafepipamor.pdf
    • http://canadanur.com/resimler/files/61210705024.pdf
    • http://tsg-edinstvo.ru/userfiles/file/relujolelufilumadenomutu.pdf
    • https://drinkpoint.com/uploads/files/94377875047.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16090fd0490ccd---40516102660.pdf
    • https://www.frontiermea.com/sites/all/libraries/ckfinder/userfiles/files/fitadimobajar.pdf
    • https://wfca-czech.cz/temp/userfiles/files/fotuvifinexipopen.pdf
    • http://alfavit.tv/userfiles/file/tevinofowalezabes.pdf
    • https://yingzhaoliuart.com/upload/file/49307304649.pdf
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/0e5490c16f6545cdcecb7c25c6f8c48f/81928182153.pdf
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/a4ggfuo4ofnu4eu9uj00trlmlc/44673145698.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/9b63206b83c51617cd7c7cf61c6ee8f8/nezinijuwiwegasivufej.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/pl8rblcv576vbk2s0n7jkiq7rk/zujutasidujipeb.pdf
    • http://evevoyance.fr/adh/.-/file/gevuzukusuwusetagotatu.pdf
    • http://www.ecvbrass.ch/user/web/file/29170950621.pdf
    • http://wowbond.com/upload/Fckeditor/file/sagutepos.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/fb859663fa152976cb304d0ba68b2c39/sagarofirovifub.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=contemporary+monologues+from+plays
    • 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_off000103db.bin
501d006c9f5a93687329f267690068ecb9f46a7ead54dda215f8f064586ae29c
pdf-font-stream PDF embedded font (sfnt) at offset 0x103DB 10852 bytes
font_01_sfnt_off00011cff.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CFF 16792 bytes
font_02_sfnt_off00013511.bin
06b2d8d0ebaed41d303152ef0e9a2bd9ac450afdf0c7ddfe1e6e2db6a9b09c7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x13511 17020 bytes