Malicious PDF — malware analysis report

Static analysis result for SHA-256 93332f127513268b…

MALICIOUS

PDF

71.1 KB Created: 2021-09-25 02:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: dbe60cdec7febfffd4eb48c1b107935e SHA-1: 0e33e5c29367f5f5d4329e91d8000ab20a3313af SHA-256: 93332f127513268bc26ead7b19cb5d183fa0e3bec9807d579b92a905d851e3d0
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The primary purpose appears to be distributing further malicious content or leading users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://albawadiroad.com/userfiles/files/megowifedoxofezanukitike.pdf In PDF document text
    • http://asupuro.com/upload/save_image/files/81745167373.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613941fbf2fa8---kutapamemavusifajowijare.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/6472a60c2335a3e99131f94e30bc61dd/4179657256.pdfIn PDF document text
    • https://studioconcept-stand.com/fck_userfiles/file/rarapiwikufegalufapi.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/8d09f028b181834809ee729a9d709b0b/12591985252.pdfIn PDF document text
    • http://bidadapatidar.com/userfiles/file/rowifi.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/lakofoxozopaketom.pdfIn PDF document text
    • http://primethailand.com/ckfinder/userfiles/files/68455864219.pdfIn PDF document text
    • https://booking-news.hkdnracing.com/webroot/editor-uploads/files/45863149441.pdfIn PDF document text
    • http://quick-thailand.com/images/uploads/file/vusawen.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/9007183793.pdfIn PDF document text
    • http://rotang.net/userfiles/file/56007741.pdfIn PDF document text
    • http://thebodyclubonline.com/userfiles/file/kudasanitadilivigido.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/72086565610.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/44939769292.pdfIn PDF document text
    • https://alharithiforcameras.com/ckfinder/userfiles/files/67354630485.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/21376136414.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/wuzisoseximiwogajux.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1614be48a1cd57---69463882296.pdfIn PDF document text
    • https://rajatotogroup2.com/contents/files/78205935346.pdfIn PDF document text
    • https://rsebolivia.org/userfiles/file/32362607045.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=new+tamil+movies+2020+downloadPDF 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_off0000b2c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2C0 17116 bytes
SHA-256: 6e2908de5b02ea98694e0428925d635ce9aa2fbeb6179732dfd2dfcc4aa6328f
font_01_sfnt_off0000de5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF675 10680 bytes
SHA-256: bf2acb0f45b24f711fef6027aa904f33fbe6ad609c9278cd4a2c6919dfa42dfa