Malicious PDF — malware analysis report

Static analysis result for SHA-256 f37d30b98eb7fcb9…

MALICIOUS

PDF

81.5 KB Created: 2021-09-11 05:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2b4f4773167b19a8c4788edd77cc25a1 SHA-1: eb18706338997ea4084e538a0056b0a6627602cb SHA-256: f37d30b98eb7fcb9b5fe65fb565807bdacb6cb085f7f00122762cbb42b384d18
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a malicious intent to distribute content or malware through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://coretry.ru/uplcv?utm_term=minecraft+classic+browser+game PDF link annotation
    • http://marklaliberte.com/fckupload/file/xiwugafopukapuwo.pdfIn PDF document text
    • http://okuninka-biale.pl/userfiles/file/winufibik.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/rosofeluxexoralipe.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fca55bc712---kesuwokibamovug.pdfIn PDF document text
    • http://rayocazar.com/images/elfinder-1.1/files/file/48562880180.pdfIn PDF document text
    • http://esistore.be/userfiles/file/94770480872.pdfIn PDF document text
    • http://vevo.keresztessyoptika.hu/elemek/file/xasunolubixulululowodawa.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/57321206405.pdfIn PDF document text
    • https://airin.lv/images/userfiles/file/54810073649.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/tenelatitet.pdfIn PDF document text
    • http://panel2conso.com/userfiles/file/78274514766.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/87868544384.pdfIn PDF document text
    • http://easternhoteljeju.com/FileData/ckfinder/files/20210909_DBDA3F4D63D2529D.pdfIn PDF document text
    • http://zjgjqmr.com/v15/Upload/file/202199648371011.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/20219101551519187.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/kuvaporomebiwivef.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/lidotazulasiri.pdfIn PDF document text
    • http://paddockj.com/user_data/editor/ckfinder/core/connector/php/upload/files/ritase.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/91591110844.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/57504064062.pdfIn PDF document text
    • http://insureavisitor.com/userfiles/file/70297401992.pdfIn PDF document text
    • http://flirdining.com/uploads/files/kaxibite.pdfIn PDF document text
    • http://360global.ca/userfiles/file/53884072832.pdfIn PDF document text
    • https://mimpidia.com/contents/files/bamunijogoduzana.pdfIn PDF document text
    • 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_off0000d9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FF 17712 bytes
SHA-256: 1700fd106f837240720b773c1d2f98df46edf161c6315a2e88c53c797e3b5b39
font_01_sfnt_off00010752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10752 10900 bytes
SHA-256: c7085d063978a010ace09bc70010968575cc95876dc949f42f63cd6eb6277648
font_02_sfnt_off000120a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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