Malicious PDF — malware analysis report

Static analysis result for SHA-256 a67839e4686391cf…

MALICIOUS

PDF

95.3 KB Created: 2021-06-29 21:24:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3270dd825ead857363967dd6c8e4f766 SHA-1: 2e96cde1946a726178c74585e41a0b7398606581 SHA-256: a67839e4686391cf115777d62347f0de225b2c010b8b8ccc0293cf17580067b0
196 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of an advance-fee scam. It contains numerous links to external sites, many of which are hosted on compromised WordPress installations, suggesting a link farm designed to distribute malicious content. The document's structure and heuristic firings strongly indicate it is part of an advance-fee fraud scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3cb578d1f0---fapodiladewejapatis.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/6c9a3e25d43253fb5d3896c677d626ce/wiwalominoz.pdf
    • http://mastera-mix.ru/ckfinder/userfiles/files/binitusuguruvuvobutixogo.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160761c8229263---zeguxexutoziluvoleru.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/n794224crdfq2qj70nd9m9mbi4/33713029463.pdf
    • http://beerskiboot.com/img/upload/file/15052269275.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce0719d68d---2721829679.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/fowojivedixosewuxarazixol.pdf
    • http://ontsgoi.shop/uploads/files/topuz.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/180b7ed5703a651c2f7e9bc5f1346d24/totarovorinadivu.pdf
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834a0d25b93---koxekoj.pdf
    • http://grandp.ru/userfiles/file/vivonoxanisibuzabetej.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b491de18ec1---mokotoxugi.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160928f0c76a22---61158385143.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/ui84ner5vib272lq5887cr1ij4/57636291203.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b87305d1d33---97176165218.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/c3122f4fe02ba4ab8760ed32893d1d2e/tubudijago.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a03b8bede---12371287687.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/epfmd8brka818agn5gjtst80j4/63587213310.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7742cb42b1---zizideviwi.pdf
    • http://richardsonfamilyreunion.net/clients/7/79/79e100fddb184f5a3447a495e7c481fb/File/sorilukagewanajibofi.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1c66ea383---vonagaxuwumifuwemotalizo.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/351kak56ribvrstlhu3gcahnn6/pugaxenipusifotilesi.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/fe23f7af437cb0abc14594b9dd989df0/ponujeraz.pdf
    • https://robert-zauer.cz/userfiles/file/tukifigisusuxujan.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=how+to+do+outline+in+photoshop
    • 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_off0001124d.bin
570e2fc3b9f206dff7b0f45def5e19dab6f8b828d11afb6d1a3a5716e800f0a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1124D 17580 bytes
font_01_sfnt_off00014079.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14079 16792 bytes
font_02_sfnt_off00015890.bin
e401ce0b79ad398045100d2a0dc8204bcf77862bd0766283e54e85d3ccd4f967		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15890 10404 bytes

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