Malicious PDF — malware analysis report

Static analysis result for SHA-256 97029ef336e2f8cd…

MALICIOUS

PDF

98.5 KB Created: 2021-07-31 06:50:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 70ea2f331aacd85e00e83b4eda4ee143 SHA-1: b1842b753e81c3d38c0611ca75bd4514861839a1 SHA-256: 97029ef336e2f8cdf12280ff39a783f883ca79739356ecfacbb790b72ce1bb50
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress installations, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and embedded URLs are indicative of a phishing lure designed to lead users to external, potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9784

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 http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084310f75870---57614587727.pdf In PDF document text
    • https://sedefartphotography.com/resimler/files/vemuf.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/girivol.pdfIn PDF document text
    • http://446888.top/userfiles/file/33614972648.pdfIn PDF document text
    • http://francescofesta.it/userfiles/files/fuwijovibavupepivido.pdfIn PDF document text
    • https://nepalipublisher.com/ckfinder/userfiles/files/bogemaredusu.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/cbd19a270ca17d6cc56a55e63ae86dea/wumedesoxolitamugusizan.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/xekatatolel.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610255e5afcfd---1836973357.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210629062405.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/99219764302.pdfIn PDF document text
    • https://sharadsangam.org/UserFilesTwo/file/91150260300.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160971cc4a07b0---36786684869.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a866cea3fe2---taduvogijuzemetele.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c85b91c11a---desugumumuzubewogu.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/10028429001.pdfIn PDF document text
    • http://folientastaturen.pl/_data/file/93278749044.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/021419446506.pdfIn PDF document text
    • http://carszana.com/image/upload/File/74430243037.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc23ff1baf4---wavidabexejokajon.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16097856a6be07---66396386749.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/39749829859.pdfIn PDF document text
    • http://builderall.info/userfiles/file/84793205247.pdfIn PDF document text
    • https://hirurgija.me//files/6456496520.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16085955c39c68---raxuxowered.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160831d591a080---60470601901.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/30a74a57670c24f5a4a4eadf757b00bf/depoxifud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=good+scorpion+combos+mk11PDF 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_off00012010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12010 10560 bytes
SHA-256: f2a4682b7990b12083e4f848cbb80f3579e70e507de7d6b178303084aeaf051e
font_01_sfnt_off000137db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FED 17136 bytes
SHA-256: 7660813e21815198b3e05f34540e3f8ea4adabffa7138337c7d7d42e96715441

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