Malicious PDF — malware analysis report

Static analysis result for SHA-256 17ec17ed31de77d1…

MALICIOUS

PDF

80.8 KB Created: 2021-09-07 03:57:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fd2656c9e495e8705844eb03e1ad6236 SHA-1: 12d92701de82eaa2b5c21112f36b5f5e184a0c9b SHA-256: 17ec17ed31de77d1d212d79cbe7831d4bc28986d28836cca47a0be8a75d7084f
156 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on compromised WordPress sites, a common technique for distributing malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the presence of numerous links to potentially compromised domains suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e33351fe0f---44963553284.pdf In PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/dikoxewimatijowew.pdfIn PDF document text
    • https://autonoleggioassereto.com/file/88272632383.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/sbm4vulptugts210v7mnrc6911/kegebidetusib.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/82914fea314b01354e3d5e659bd81ae8/sojusixekavew.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107bc4fbd640---zegapasefufimeseron.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607757a3da3a1---pudagewasem.pdfIn PDF document text
    • https://epiphanych.com/images/file/81889715045.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/226298b66d48ad2e743a71512f6e6e4b/gafejex.pdfIn PDF document text
    • http://matras-devison.ru/upload/file/kometafefawat.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/64787487935.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/leviwajupivomobonumu.pdfIn PDF document text
    • http://www.minaakshimajumdar.com/fckimages/file/29001049146.pdfIn PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/takevudaxofa.pdfIn PDF document text
    • http://boxethai38.comupload/file/nukomuzawadajigox.pdfIn PDF document text
    • http://artiguardia.pl/userfiles/file/gikewugetiduxab.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/21756637022.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1d998087a4---taner.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082cfb21921d---67805599523.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/nomugipufudedonabe.pdfIn PDF document text
    • https://nevisnews.com/userfiles/nivurupi.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075124ee1670---joxewalidisofuvedogob.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/87325858989.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/78906986345.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/25909828593.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=word+family+worksheets+for+preschoolPDF 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_off0000d55e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55E 17852 bytes
SHA-256: 6b2b35c862d2c88250678914d2faa241809c7db39582ee7ed2f5003e26c3c03e
font_01_sfnt_off00010345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10345 11068 bytes
SHA-256: b96a5b63a9547d9b39ae373b15787916aca1607c05cc698489cfee30c71125e4
font_02_sfnt_off00011d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1