Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a7c2cefaae83ce2…

MALICIOUS

PDF

83.4 KB Created: 2021-09-05 08:31:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2c1741dd80ada3164abf52567ccaae03 SHA-1: ff5137961dc673a168305257f53f8c06779706a0 SHA-256: 4a7c2cefaae83ce2633684c17277c8de1523d68191b9a085a58b68366286bba5
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics strongly suggest this PDF acts as a lure, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://queure.ru/uplcv?utm_term=business+plan+project+report+pdf PDF link annotation
    • http://www.patriarca-batiment.com/ressource/site-image/files/lafidolefowigosive.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b07a1c40ed1---90350151333.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/77067650995.pdfIn PDF document text
    • http://www.saito-ken.jp/userdata/file/dabosozatuxa.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084e6b4d7372---81140544584.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160930c2000f34---gogesodafigoduvul.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4e0f6cc39f---87094153083.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/s2u8l3ls3v25m3co1brjbe17kf/65911068712.pdfIn PDF document text
    • http://applecentervn.com/uploads/image/files/jofeto.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607363e17c353---jupomekebemojux.pdfIn PDF document text
    • http://newgatedesign.com/Images_upload/files/sodixorekotejizagiwetam.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/7om0qi3hk86hcf5jsf9t55nui7/ruwijurofa.pdfIn PDF document text
    • http://learningkey.org/userfiles/zuzijixujebipakajopa.pdfIn PDF document text
    • http://chinhsuasolieu.com/media/files/verofug.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/gobajatokinos.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ab92b4abc---jesexubebatuma.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/topiditijojaf.pdfIn PDF document text
    • http://buyyoutubecomments.com/ci/userfiles/files/65575325584.pdfIn PDF document text
    • http://www.climatisur.com/ckfinder/userfiles/files/jidabinuposisabuxa.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16123686f05668---xozuwowajibazalamupage.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/xisame.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/samafoz.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/kazomegoxoturugupewofipo.pdfIn PDF document text
    • http://restravel.ru/ckfinder/userfiles/files/76289482762.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DB 17252 bytes
SHA-256: 0610a45e7364f8023988b62931bf4ee3ff030c582a6b7163493ee4715c6f34be
font_02_sfnt_off00012640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12640 10896 bytes
SHA-256: 9225c35a94f46ff4b90aeb515a7b79239d01286a52afd72928a6f2eda4128573

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