Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f6e4e35840d14e…

MALICIOUS

PDF

82.4 KB Created: 2021-09-13 23:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f94d26ba36d52bcc71612300cd15b2a5 SHA-1: 1fdfd8798c7e3e5014a1ee259b2afb4ca7fd047b SHA-256: 00f6e4e35840d14ecbb22de25caae4bdf4c710d938afc64e85ff28cfb3cff4a3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous external links, many pointing to potentially compromised CMS upload directories or disposable hosting, suggesting a phishing or malware distribution lure. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect the user to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://ascii.tn/web/cgi/file/96193518967.pdf
    • https://riminabda.sk/userfiles/file/pugofozuresiwifo.pdf
    • https://cosonnguyenthanh.vn/webroot/userfiles/files/11310551125.pdf
    • http://mientaytourist.com/uploads/files/jabugevurotofoxej.pdf
    • http://vietsonplastic.com/uploads/userfiles/file/81560592011.pdf
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/82bcbaa8a75804e2e36d2a06d63fab34/75403140895.pdf
    • http://kmjmt.com/news/upload/file/21091014305582089656pave.pdf
    • http://oris-am.com/editor_up/83802909662.pdf
    • https://biomisszio.hu/tmp/97935613537.pdf
    • http://didaconcept.com/admin/fckeditor/file/6066012375.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134c53653236---totidexukumiju.pdf
    • http://albertopizzetti.it/userfiles/files/26783291608.pdf
    • https://alhasooncorp.com/Files/files/ruguvidajinozujudobuko.pdf
    • https://thuaphatlaihanoi.net/uploads/files/47550994290.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/97346287614.pdf
    • http://www.naraihillgolf.com/admin/userfiles/file/2025361401.pdf
    • http://geometramaurotozzi.it/userfiles/files/25229264732.pdf
    • http://el-master.ru/userfiles/file/8099272640.pdf
    • https://creativenursery.net/home/creative/public_html/ckfinder/userfiles/files/jibomavevodo.pdf
    • http://ozt.zielonetarasy-cieplice.pl/uploads/userfiles/files/borirogiwokijufokovewo.pdf
    • https://ciela13.leaddeehub.com/userfiles/files/basis.pdf
    • https://ksmt.edu.np/assets/ckfinder/userfiles/files/6505290315.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/34c61ec118d573dfd5c072f4e21ff9c0/50043879251.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=download+bus+simulator+vietnam+free
    • 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_off0000dd1f.bin
521eb2ac03888b4d908b6140daba848d3e30c594203282b531ce6e1bd9309c02
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1F 17476 bytes
font_01_sfnt_off00010a8b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8B 16792 bytes
font_02_sfnt_off000122a2.bin
82fe488ab5f4fc365daf92870cf1a2580d9a4dee7dc544c36ac5b4fd608b90af
pdf-font-stream PDF embedded font (sfnt) at offset 0x122A2 10908 bytes