Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d11eff7a3ef15bf…

MALICIOUS

PDF

75.2 KB Created: 2021-09-23 12:46:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8373ecb8ee98b352da2cd58b2473eb0e SHA-1: 26024a5feae92acefc1549c554dd5db75409beb0 SHA-256: 6d11eff7a3ef15bfd719d81eb8db82b6d9a0b8fdfe2e2b620c52205aef437f0c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing or trojan variant. It contains a high number of embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this. No scripts were extracted, but the overall structure and URL distribution indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://wingtsunkungfu.ro/imagini_ws/volurobaloxutotebe.pdf In PDF document text
    • http://hiniceshine.com/upload/41646092.pdfIn PDF document text
    • http://premiumcsp.com/uploads/files/molimiragu.pdfIn PDF document text
    • http://utpcomp.ru/uploads/files/38598068839.pdfIn PDF document text
    • http://zjgjqmr.com/v15/Upload/file/202191884202601.pdfIn PDF document text
    • http://studiobonvino.com/userfiles/files/xijuzirapexi.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/dizedeki.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/af79ba98acb0d53a6219cce6fd8fccef/71491852844.pdfIn PDF document text
    • http://tnshoppingbag.com/upfiles/file/vipikutimotageka.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/kojovosunateniwidumisug.pdfIn PDF document text
    • https://kalashad.com/userfiles/file/62510383466.pdfIn PDF document text
    • http://mptech.vn/ckfinder/userfiles/files/xinoxopu.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/13360337658.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/wodovev.pdfIn PDF document text
    • http://mq-water.net/upload/16965119704.pdfIn PDF document text
    • https://sindhuinvestment.com/ckfinder/userfiles/files/62884707743.pdfIn PDF document text
    • http://pozitron-s.ru/userfiles/file/vevelojupuxefeb.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/junobuwufepizotir.pdfIn PDF document text
    • http://muaah.ca/userfiles/files/zafiwamogode.pdfIn PDF document text
    • http://meghdoothsuzuki.com/uploads/5121776970.pdfIn PDF document text
    • https://peterdegendt.be/file/tixeregikajisuveranufup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=mario+nintendo+ds+romPDF 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_off0000bceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD502 10356 bytes
SHA-256: 3d1758a1b75c73920de1601dc67028a095089de4469b886f38dc7bc277f126b7
font_02_sfnt_off0000ec61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC61 19336 bytes
SHA-256: bfa0f008a4c89ef7c2870b0d22ec5dc8991899e23d9df69748bbce03267e31ad

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