Malicious PDF — malware analysis report

Static analysis result for SHA-256 801bbd4f03314d3a…

MALICIOUS

PDF

85.9 KB Created: 2021-09-06 17:27:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c66bb397d042b90807d8f9b339701bc3 SHA-1: 94d7e8a7273e097bd142676ce6857a0e53c19f21 SHA-256: 801bbd4f03314d3a6a282b65bc5c8390bc92ef34deab8526fc5aebd5e9266a75
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the link farm suggests an attempt to lure users to external sites for further exploitation.

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://vokalensemble-vocembalo.ch/userfiles/file/62298285190.pdf In PDF document text
    • http://surrattsville69.com/clients/8/81/8122276c22396d7fa0996010cc369f50/File/5562695122.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/069dc03b9532cbaa4be0c29a9280b73c/36054818002.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9fc6d707f---puwumapesatejivaguzagofex.pdfIn PDF document text
    • http://ngnjl.com/userfiles/files/wazijimakem.pdfIn PDF document text
    • http://budaikepkeret.hu/uploads/file/21372890946.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d18d47a9b2---wobero.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/fotewitujofejisib.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c1f8682d22---71739041184.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cc6a79c885e---26717629050.pdfIn PDF document text
    • http://lotusburbank.com/uploads/files/53939797768.pdfIn PDF document text
    • https://timminsrenovations.ca/file/faB2vZINShbcU50U.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff94f2e14f---97814078262.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/8f416844d3a35cee95176af830c75ea5/tigejibaruxamaxodu.pdfIn PDF document text
    • http://northstarbaptisttyler.com/clients/a/a4/a4b4c2e389351fb2dee96c3f727c6a57/File/98006169645.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609da0919edf2---taniwupevujeluzefuseput.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16099f7ae8be8d---xekexikajo.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/wikamakuzuzegaru.pdfIn PDF document text
    • https://sensesgrouphk.com/louis/STARKGROUP/ckfinder/userfiles/files/77279445649.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/peloponanerebunew.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609edbcb0c86a---xabogakisisurutit.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/39736110141.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/20975626606.pdfIn PDF document text
    • http://csp.hu/editor_up/boluzozofixasabif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=ecumenismo+protestante+pdfPDF link annotation
    • 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_off0000e74c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74C 18820 bytes
SHA-256: ec77135ec6eec419b0cb91e005acc22f59cc7e7ac57a4ddc42a499b5f4c6f0d9
font_01_sfnt_off000118fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13111 10816 bytes
SHA-256: 5c8635a75f900f3be29b1fcd9d4c0eeb5a7593f394856e5a45b8abfd75c45ed9

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