Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0794cf83ba44ed1…

MALICIOUS

PDF

105.7 KB Created: 2021-09-05 22:15:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d2a004d8d2d5d51b248536f34a4e9e38 SHA-1: 51ead9b8a0c5a490a0741a821fa75b4d643f63c6 SHA-256: e0794cf83ba44ed153923f7d9750002b4200233496ef7cb16b9012681f00a2d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised CMS upload directories or disposable hosting. The heuristic firings indicate the PDF is acting as a link farm, likely directing users to phishing sites or further malware downloads. No scripts were extracted, but the presence of multiple external links suggests an intent to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://infrive.ru/uplcv?utm_term=manual+apa+reference PDF link annotation
    • https://medtek.vn/storage/file/2571500586.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/17595539934.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160881a5f30243---pozuli.pdfIn PDF document text
    • http://etoprosto.ru/ckfinder/userfiles/files/38517707209.pdfIn PDF document text
    • http://eurolocal.info/sites/default/files/images/file/bovizevojudatot.pdfIn PDF document text
    • https://mtmnetwork.net/uploadEditor/files/wutiniregigasujafoj.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/t5nijoe2djclsaiv0m19pv18bf/nuzasofabakatew.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/09/05/file/20210905_052150_157.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/2c829c77803ab33b4dfee955c27de4b9/netajetukadud.pdfIn PDF document text
    • https://electroagro.es/pub/files/poraleg.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612d1a4f8112f---23185346906.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/fobekagabi.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7fb3161f44---68823549520.pdfIn PDF document text
    • https://atphp.ch/userfiles/file/novutakafegebi.pdfIn PDF document text
    • http://gloucesterclassof81.com/clients/23558/File/wosofanipelomujidututeroz.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/lapituguxet.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/15544908157.pdfIn PDF document text
    • https://nonbodepsg.com/uploads/files/39919787850.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/6b80c24dcfe4d78b0b0cf35fb80008d2/xugonexadagutudog.pdfIn PDF document text
    • http://ceramkgres.ru/userfiles/file/15857776364.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b79d387c9---14358665327.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a87f34815f3---72037694506.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_off00013810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13810 10088 bytes
SHA-256: 0130dffe2bef53898f0b0b6a90d51c5bf9c606274808d83af2849c4b37a9845a
font_01_sfnt_off00014ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000166b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166B9 19368 bytes
SHA-256: 79ff5d6ca8802a52956fc08e7e3b59807f0bc86315c1e200a313d042b7660e4c

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