Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d0c10ee18c2e578…

MALICIOUS

PDF

81.7 KB Created: 2021-09-07 07:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3e201a1b7a0171e9acc2da2728233a3f SHA-1: 868b2a834a1c9d2923d36b0a522c4318ca927372 SHA-256: 1d0c10ee18c2e57873bd212a56e5153d551f52f87053f26b3c2b1775f2652b90
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://agrocare.ro/ckfinder/userfiles/files/fopomibedetud.pdf In PDF document text
    • http://gitimohammadilakhimpur.org/ckfinder/userfiles/files/25404794948.pdfIn PDF document text
    • http://aapltd.net/userfiles/file/jomametusobodidil.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102f8f157b0a---fexetijol.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/48538797666.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/77f232bdfc93b8481f567da687ea43f1/17475572908.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c12333e3326---60432659216.pdfIn PDF document text
    • http://darangyi.com/userData/board/file/masomokumomamopipagaxa.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b8aec1ba4---fifikilo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b49149de308---lofidesadorimu.pdfIn PDF document text
    • https://ntct.dz/ckfinder/userfiles/files/fulewix.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16077f051764fc---xebagaf.pdfIn PDF document text
    • https://totalmediasolutions.ae/ckfinder/userfiles/files/barevedosuvujaxetazozize.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/fc3e7e37b42755519fae562081d0ded5/masotaze.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/c99d3eadbf8581fcf6b9894961c2a501/77368786324.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/kuzofuxifefivukus.pdfIn PDF document text
    • https://kund-in.com/userfiles/file/38323794296.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/9503735417.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/f26357adc0cd36356cfb002310aa316c/90008061100.pdfIn PDF document text
    • https://5uempat.com/contents//files/wowigudizilerag.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/161189fe25dcf8---ditobedatobuzonadofi.pdfIn PDF document text
    • http://teormech.ru/teormech/usrimg/file/wibebobinevekededawowawop.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/3465b05c27b6c550069379f9a5465b03/14799144615.pdfIn PDF document text
    • https://szud94.hu/img/sajatfile/files/66171568231.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=body+parts+in+french+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_off0000dab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CE 10836 bytes
SHA-256: da1bd9fd75b3dbe28eb7eb081b621557e1d73e3798d7c27dd7d6fd9cd426526e
font_02_sfnt_off00010bd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD5 17580 bytes
SHA-256: 63a578e9676b21a6fb205f776a1147f2f6fa46e7fbb16d7dcd9b81cf1d3345af