Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d6a74b48829d51…

MALICIOUS

PDF

89.2 KB Created: 2021-07-28 01:43:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2a15515edff49fae42617ec5b4a96add SHA-1: d83a27f35a34d4ecdc22fdc8e53a307993839840 SHA-256: e2d6a74b48829d51a487a59e3ad973cfc15172bdb6ce94aeb03769021d725aae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://sbhs1967.com/clients/8/89/8985ce50e7417da620f75e2af787291b/File/relugavi.pdf In PDF document text
    • http://akinmedical.com/uploads/file/doludaroxumetinebapuwuv.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/razelipodajipusejob.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/89852164.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/sfheub41jelbr833h2r219fu05/99137739972.pdfIn PDF document text
    • https://govox.co.uk/wp-content/plugins/super-forms/uploads/php/files/4gr3b26jdklv00ahrs3i4nnn1k/76295252978.pdfIn PDF document text
    • https://mtmhomeschool.com/mycms/uploadedimages/editorUploadedImages/file/nifoz.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077ac7f5866f---tuvelewojeli.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/kosejagekogataner.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb2b0043bc4---vupabowivopejuwenozuzanu.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/0c1128a0eaad5424895a40a2966200ad/97719714379.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/23771546824.pdfIn PDF document text
    • http://119hero.kr/userData/board/file/vupapazodovuni.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094203848424---22341793186.pdfIn PDF document text
    • https://taksis.lv/taksis/userfiles/file/80918568348.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a2930a61640---pegividavotanezubujibote.pdfIn PDF document text
    • http://coffee33.ru/archive/file/zopefimosesilixaki.pdfIn PDF document text
    • http://kopdesign.nl/userfiles/file/41696600627.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/5a78bc6a0ea95f09f13177be4e485bd4/7658020235.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/ddb3b522252fda47d6009ac7d270b05b/60421791128.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/jagagawaxuterewubijobeg.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/91767df6c2d2c8b7c5553d6ae109aa2e/82556257207.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=green+smoothie+challenge+recipes+pdfPDF 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_off0000f84d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84D 17256 bytes
SHA-256: 148ac896294cabbc387b2fa0a7e5e922518d5c7157395d8625079c632811aa5a
font_01_sfnt_off00012513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12513 11104 bytes
SHA-256: 2c7c67c10521569a980e5184500083c378d7a176efc9b4eb009f6012e5dff91a
font_02_sfnt_off00013e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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