Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6fa41955aca2921…

MALICIOUS

PDF

70.6 KB Created: 2021-06-20 19:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 9736ab01021c461859341b187d39509b SHA-1: 5007d96777bde89cd5b4cc0a320b7e5d4801db9b SHA-256: a6fa41955aca29212f8423817899b96be23c3ac4562133be848adeeec64572ca
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection for phishing and trojan activity. It contains embedded JavaScript and functions as a link farm, directing users to various potentially compromised websites. The primary purpose appears to be redirecting users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba504a15f15---selaluxabikugevogonibaxem.pdf In PDF document text
    • https://birgatour.mn/js/ckfinder/userfiles/files/64583905964.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/46029547655.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb180d75ae---muliribawuvisiti.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/4f1aae4d7fb0457201e1d73efe0c172d/sikusexerigemirub.pdfIn PDF document text
    • https://nestsearch.in/admin/uploads/file/34892061667.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/titoduvosodizofaka.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/14627457676.pdfIn PDF document text
    • http://mppscstudy.com/admin/usercontent/file/wegivomigir.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c00a9b5a10b---40678966675.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160893a5411400---56357322075.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/d98b42bbb514e753bc4f35c0ffbcdefb/dogivitupojetekerokezufof.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/gaxipitozerofa.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/cfgq3soueqfaj14f9pgvjvdcn5/90004152391.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/81110850342.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/7s572a8ohcpekln469ejp6f4g3/2753633076.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/xiwixotogojefijimimot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=whistle+sound+freePDF 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://scripts.sil.org/OFLIn 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_off0000bdf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDF1 4800 bytes
SHA-256: d354adfbaf4d133b0dce5993001bb2473c672e7718316797fa97c14e55fab13f
font_01_sfnt_off0000ce48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE48 11712 bytes
SHA-256: f702510e897deaa45649fbc05a1b43de386742476860e5aac3519234b23dafe3
font_02_sfnt_off0000f67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67A 16272 bytes
SHA-256: a7b1e01542dab829d2ba5dd7846da79335ded9f65a948c274aeb683100f5fd08

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