Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b3a5409ff1043fb…

MALICIOUS

PDF

88.2 KB Created: 2021-07-05 22:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 551491632b298f2eb6b4a5f5d3c63f7f SHA-1: 6df643d2f54b836e307b0eae4aee2f3855d1d956 SHA-256: 9b3a5409ff1043fb73c83a4236ff5d8590e2930fd158d546a13ab17624f7df9d
164 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL findings are sufficient to infer a malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9851

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/omi0t79ls2vcbqhfvh74alvoq2/84999481954.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c983a60befd---48454506628.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/3c3a0f78080d65e34253788c95c47042/10600007965.pdf
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/c1115764ec09c92369b07620a96706b0/73510120050.pdf
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/d743bd92fd37215ea1bfd593985641c8/nodudezazelowulene.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d96e4eec7b---16951928045.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a8ee70816---66868062682.pdf
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/hi5skbkcu8hl9dgpn4r36d8inr/vawevelesuneviz.pdf
    • http://pk.mo/userfiles/file/resam.pdf
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/gekubivivumab.pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/4ka003dh470gfa353774hqqdi6/godar.pdf
    • http://duancanhotot.com/upload/files/68036916223.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/97f9dfd9be1d87659294bb47ee2679ad/velosu.pdf
    • http://oryginalnedekoracje.pl/userfiles/file/tujisukedorop.pdf
    • https://igruppe.no/ckfinder/userfiles//files/47603353942.pdf
    • http://flexa.cz/docs/file/20363275942.pdf
    • http://reversetheclocknow.com/ckfinder/userfiles/files/vikupojowo.pdf
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/g2j7ks9dpfuk43ns290b4kmag7/32516118154.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/9fkofbbtchqlp0ch0me37vk5oh/79615065575.pdf
    • https://chauphongasia.com/wp-content/plugins/super-forms/uploads/php/files/brlfte90hlinfjon37k3i4omoj/51598662104.pdf
    • http://alimentosldm.com/userfiles/file/sewukotokesuzemisofaludop.pdf
    • http://colafranceschi.it/userfiles/files/55602810473.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/38521bb4491a5f7d677af283da02f0f4/vakizanejexuges.pdf
    • http://perfekttorun.pl/pliki/fasenirusov.pdf
    • http://antifftech.com/uploadfile/file///2021062917583451.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=long+cases+in+clinical+medicine+abdullah+pdf+free+download
    • 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_off0000d277.bin
4c472ef4339c42688c02f2ac2960a8c6a4e4b86906efa0d446fa2599cb33a489		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD277 17144 bytes
font_01_sfnt_off0000ff2f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2F 16792 bytes
font_02_sfnt_off00011740.bin
33a5cada88dcfbaad92cfbd1a9965b3c2e75abf22e279db25c355c412891cd80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11740 16720 bytes
font_03_sfnt_off00012f38.bin
4b9155145a86a89991f9f829693edee47a13e1f910fb6701302c1084a8dc7fcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F38 11252 bytes
font_04_sfnt_off000148fe.bin
3aeaaedfb2ee4d993e8badf720721f444cd4072146a2f807f9cd99ed7e03ed35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x148FE 1944 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.