Malicious PDF — malware analysis report

Static analysis result for SHA-256 db46e8608900dc5f…

MALICIOUS

PDF

86.2 KB Created: 2021-06-28 00:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 06d02a69f33cbc6472dfc9b49a109641 SHA-1: 4a0a15e6c9123341112a3358e2b8f60e71c9aa7d SHA-256: db46e8608900dc5f84e13dc2d96d4849619cbc14b7350a13292d064700fd4000
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://dentalrud.com/userfiles/file/wirosivigiwonekadezan.pdf
    • http://travellightnepal.com/userfiles/file/39808387690.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/38pdta47lvk90pqbk8cft3lh88/nedozemikuno.pdf
    • http://aclamerica.com/customers/CMS-IMAGES/file/sevasozeximemujupaxew.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160793e321f788---ririlowutifulebesedag.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7776100b92---96425032364.pdf
    • https://clubforeducation.com/FCKeditor/userfiles/file/wumagosor.pdf
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/418a15f73808b6a6a6bc7aa4398d5ba2/33839946391.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/8e5e6059147168f9266fdcd81921316b/baxeli.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/4680b0d309940d2c27a0e2aa387c3cd1/vitowevowinole.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160d81b2b2661f---91958665338.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/ied6krducq6jpt03slcsm18cug/57428023070.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/54421bd5df4052d05f96e541270867f8/somifise.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/25cfc4f35431397c508c4325c44f2057/kopatuxirajavow.pdf
    • http://staples1981.com/clients/b/ba/ba027a536d51c1d997ee76cae6dc9017/File/tuzijupokamisumudidug.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e75099c7cb---jizade.pdf
    • http://www.jobsincrete.gr/images/_user_na/file/gibulepokolonexuvajuwog.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/46398501ca75f43dc9d827e186780463/37598976255.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a4923805779---jonuligutudinarozox.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b535891b396---dumulogeb.pdf
    • http://pension-erlkoenig.de/img/editor/file/felotuwamojaladitakusek.pdf
    • http://www.jobsincrete.gr/images/_user_na/file/46070838648.pdf
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/68305318515.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=cluster+sampling+example+in+research
    • 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_off0000ec84.bin
677ebe20cc412d377fe300a1f77c1fdb11a1b55ba25c118f08f87dd6ddebaf85
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC84 10936 bytes
font_01_sfnt_off000105b6.bin
5976aac80a1e5bc6bd9b3c0e6747161fc95305cc2b0975ce15e4ad50a6337ab6
pdf-font-stream PDF embedded font (sfnt) at offset 0x105B6 17572 bytes
font_02_sfnt_off000133b3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x133B3 16792 bytes