Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec111bb91fc277df…

MALICIOUS

PDF

92.3 KB Created: 2021-09-02 23:50:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 214e9212443d6651e1e613de4d77470f SHA-1: 0c57765d1e92e3f9122649c1d5792bec48e866b3 SHA-256: ec111bb91fc277df5661f61260ed3ee3fa5af8b7b54dee7de4316a3ed0aaa5c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://benthanhsgfarm.com/images/uploads/files/48664832250.pdf In PDF document text
    • https://agentcctv.com/userfiles/file/72920626384.pdfIn PDF document text
    • http://donovaly-ubytovanie-safran.sk/web/userfiles/file/4315079184.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/417f3666835d5ffa9bf2fd253605781b/losewofemadomusit.pdfIn PDF document text
    • http://maility.pl_adresuserfiles/file/90619216170.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/99120911885.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1612cce3ea8a2a---82538867554.pdfIn PDF document text
    • http://momsystem.ru/public/file/44069969758.pdfIn PDF document text
    • https://ashleymongolia.mn/uploads/files/bopuzojadodag.pdfIn PDF document text
    • http://adacu.org/userfiles/file/20210724214335.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/dinesenusefiz.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2a3c618f4---67126294551.pdfIn PDF document text
    • http://qiangka.com/ckfinder/userfiles/files/dazulutuzotosupuwibemiwag.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160703e227ef80---72596852791.pdfIn PDF document text
    • http://ssatripoli.org/userfiles/file/voxedataroxevabagozaz.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/gekinexafepavabetigof.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/1772254084.pdfIn PDF document text
    • http://tremonttemplemacon.com/clients/862779/File/panirawaraxufasapax.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aafd40677f1---wurivuvajasoregavijor.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/zasewetelusole.pdfIn PDF document text
    • https://vigiweb.cl/dinamicos/files/file/45039983142.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/21f4a7f840b5862fce2327024cedc817/zofifadafepamexaxag.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/33704571190.pdfIn PDF document text
    • http://tndgdemo2.com/ckfinder/userfiles/files/dikavojenepijarulamu.pdfIn PDF document text
    • https://koratspring.com/upload/file/89416395699.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/7g2bprtukfgu18nd7unma87l85/47085971154.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/q8q81gk66dgfc7mguis4bntome/99643624575.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=livro+libertinagem+pdf+gratisPDF 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_off0000fb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB02 11004 bytes
SHA-256: 8199189b486effb749a81d5dd718f822c435d18fcc3f2caaf8d1da6230f71f48
font_01_sfnt_off00011420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11420 21092 bytes
SHA-256: 18334f11453621117a91ce091888955c4f79f6399290beaaa9f3f3ee7c6b99ca
font_02_sfnt_off00014b60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.