Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef06ffe9d8665fc7…

MALICIOUS

PDF

88.3 KB Created: 2021-09-04 21:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9209eb2ee07fd14002e35e1d945b4613 SHA-1: 59a6a2652fef16eedb4206bcd798e95a31ba2255 SHA-256: ef06ffe9d8665fc72db20b3193ccfa923ec7381730925d7bbf4bd8cc6bcad7f1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ML classification and ClamAV, indicating it's a phishing or trojan PDF. It contains numerous embedded URLs that point to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and URL patterns are consistent with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://cructi.ru/uplcv?utm_term=ictericia+neonatal+scielo+pdf PDF link annotation
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a21e56f5a---92391055955.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d5c2ee9f9---tojaguvudirejixa.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608925a97e9c9---ruvejewovo.pdfIn PDF document text
    • http://tipiland.net/upload/file/69121269329.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2a86a66b2---fixikufurofime.pdfIn PDF document text
    • http://vamaconsulting.sk/userfiles/file/49183029364.pdfIn PDF document text
    • http://goksirlambinowice.pl/img/upload/files/14389030023.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/vawigibolegudikotejimajul.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/fedatuvevutasuw.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/662db5e0f75918c959945dbe61f951df/nawewedin.pdfIn PDF document text
    • http://almawred-sy.com/files/adminfiles/files/xidibibejuwubiduwo.pdfIn PDF document text
    • http://yao-cheng.com/uploadfiles/20210704180523.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/68777991794.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/9f0ab79208118e54b73d403b77e049f4/33465240806.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/k76s8fdorlpt5cs24trks7579p/99205603082.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/fh4ldq8fbkdotupqvonrev1oht/10173509001.pdfIn PDF document text
    • https://silverbirdmarketing.com/pages/images/file/59343414996.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/e04bef3ad2e4323ab1d10fad1a6f5aef/52577954896.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/fb82ce8fd1754031f5fa2fc875d5c714/29895441292.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/navomegimosujimux.pdfIn PDF document text
    • http://suapaiatuipelehakefamily.com/clients/80707/File/vorikimorunopi.pdfIn PDF document text
    • http://jhsclassof63.com/clients/c/c8/c8cc7cee7579ddcd469b669c0eb172d8/File/92470167027.pdfIn PDF document text
    • https://krassimirtaskov.com/userfiles/files/mibavonodumimokas.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_off0000eee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE9 20212 bytes
SHA-256: c9bcc3785a1af88ca2aafd0103c5afd47224a73cedab2fa88ca3ae7faa73c8c7
font_01_sfnt_off000122dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122DD 10564 bytes
SHA-256: 47d2f748e09e551f4651f142a642b3dff1c6686153b4e4ae1430cc6cc307c9fe
font_02_sfnt_off00013b0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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