Malicious PDF — malware analysis report

Static analysis result for SHA-256 132a3ee6049e625a…

MALICIOUS

PDF

85.2 KB Created: 2021-09-16 21:29:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0f38f7debbf5bd05e6ba9248d876ab28 SHA-1: 721034cde2786e73c44336b1a27ea6bb7b4ac02f SHA-256: 132a3ee6049e625a8232e968182a6566b0d67a5e7a8555dfa44ba6df6c93afbf
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or trojan payload is being distributed via these links. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://drafthe.ru/uplcv?utm_term=alarmy+sleep+if+you+can PDF link annotation
    • http://dungcumaymoc.com/Images_upload/files/65347750941.pdfIn PDF document text
    • http://ooexperience.be/assets/Image/files/rirerozinaxola.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/66237024585.pdfIn PDF document text
    • http://esistore.be/userfiles/file/68586507895.pdfIn PDF document text
    • http://xn--80aap0abfiql8h.xn--p1ai/admin/ckfinder/userfiles/files/takurem.pdfIn PDF document text
    • http://kavernoklub.com/campannas/file/21116349472.pdfIn PDF document text
    • http://shanghaiqingchen.com/upload/files/lataperilozuvazagabap.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161351a2da1f62---16719265787.pdfIn PDF document text
    • http://petraifevronii.ru/ckfinder/userfiles/files/98373495484.pdfIn PDF document text
    • http://raegcafe.com/uploads/files/zazikagonumevewuxub.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/aee94b897d91fae84ced87b201d6cdc1/xepuleximuxotudela.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/002155883445935756b71fe4420c75d7/65879097479.pdfIn PDF document text
    • https://eksiliotomotiv.com/upload/ckfinder/files/karegasokukotisokovixor.pdfIn PDF document text
    • http://architettoannalisatinelli.it/userfiles/files/21111534140.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/161379eb66024a---wawavodimezixuja.pdfIn PDF document text
    • https://martan.es/cenavarra_userfiles/files/satovofamedemipivotaw.pdfIn PDF document text
    • http://ocvitlucky.com/vietkiendo/upload/file/wubemewawijizodujaxurun.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/ip8s74m6g7avb0skvi92fgu7je/46024583291.pdfIn PDF document text
    • https://accounting789.com/ThImg/file/fugapajatituwupilowu.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/38561886689.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/kixeze.pdfIn PDF document text
    • https://kotypsy.pl/ckfinder/userfiles/files/93686851230.pdfIn PDF document text
    • http://dellalontra.it/userfiles/files/xokato.pdfIn PDF document text
    • https://lideregitimpaketleri.com/calisma2/files/uploads/67358240290.pdfIn PDF document text
    • http://pcccmiennam.com/media/ftp/file/87324431299.pdfIn PDF document text
    • http://www.miyadenthai.com/image/upload/File/11051921606.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/46715712980.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_off0000e828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE828 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001003f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003F 10736 bytes
SHA-256: 8a7b3e1290beb2a9845275cd87f816f7f55669a9c42e6c05b92d5db5ed807a8a
font_02_sfnt_off000118e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E9 17804 bytes
SHA-256: 67285d00ac62873e098d3c1627646919fee2930d4d9b0731271b791dbcce0123

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