Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e70b2a70ed872eb…

MALICIOUS

PDF

94.5 KB Created: 2021-07-27 05:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 9d324b9e507894a3350be03cd105b96c SHA-1: f12f38af1aa0ed8931f295a77ce96f73968be15a SHA-256: 3e70b2a70ed872ebca01c0effcfcf36e00df78e4faaabe94eaa1df1399a1d42e
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to websites hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to lure users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://signexpowholesale.com/project-new/christianbook/upload_images/file/javoworokut.pdf In PDF document text
    • https://hosvagyok.hu/userfiles/file/noririnajimitebapuma.pdfIn PDF document text
    • http://www.oe.com.tw/ezadmin/ckfinder/userfiles/files/46430867998.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/donuripamoloretajegedap.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/79454881148.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/35356341022.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/nopogusuvotolu.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/146e33580aec8bf1b6987de8094d4686/sanosumoguxes.pdfIn PDF document text
    • http://www.cenlafilm.com/siteuploads/editorimg/file/zavufejazu.pdfIn PDF document text
    • https://jamurgoreng.net/contents//files/44327889156.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/70286809830.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__60EFF5B6A23A9.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/43ea495789f64163f9e8536c28eb3a68/98053164397.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/e0ee18350a42de86e08a4863741a8b6e/20838977490.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/4443643914.pdfIn PDF document text
    • http://myqself.com/upload/files/44094447926.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/kagibevafilosazene.pdfIn PDF document text
    • https://gachbinhduong.com/upload/file/51790679885.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/fonbr97h00754hpbspjaksr4jk/35744216080.pdfIn PDF document text
    • http://josephfellerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/buwapalu.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/20709915273.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+save+keira+metzPDF 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_off00010e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12665 18132 bytes
SHA-256: 0fcd1f6009f30df41bdfa471e7070d8749f98cf9a5aa76184550fef8af0524a3
font_02_sfnt_off00015539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15539 10412 bytes
SHA-256: a420bcd0081bf19540c1a4efc84784c7d0a7f73e8e2ea1954ac0203366376443