Malicious PDF — malware analysis report

Static analysis result for SHA-256 45941122ada67a1a…

MALICIOUS

PDF

80.3 KB Created: 2021-09-14 10:50:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ea077a06faa49a1b1e17f35af023b0cc SHA-1: 596ff73b1a40be09f460ba99c6f91c96e6c93afa SHA-256: 45941122ada67a1af130175ac5f7b9dbf411b2e36bed9bbc8b4ff4b6d5328d09
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 embedded URLs, many of which are part of a link farm designed to redirect users to potentially malicious content, such as the 'minecraft download' lure. The presence of these links and the overall structure suggest an attempt to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://laborke.ru/uplcv?utm_term=minecraft+download+16.220 PDF link annotation
    • http://portalpr-b2b.es/img/user//file/_0752433001631168742.pdfIn PDF document text
    • http://nuovartea.eu/userfiles/files/52093467607.pdfIn PDF document text
    • https://alcc.c-zentrix.com/ALCC/mail_attachments/multitenant-ws-01/1/1630976392.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/66182260807.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/mosigalimenil.pdfIn PDF document text
    • http://ain.proximeo.com/ckfinder/userfiles/files/98806839313.pdfIn PDF document text
    • https://basundharamart.com/userfiles/file/gikesepixunavi.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/juruverevebebasis.pdfIn PDF document text
    • http://startent.ru/SITE/files/editor/file/gewasokobokelufurufixu.pdfIn PDF document text
    • http://tjchenxing.com/filespath/files/20210902172608.pdfIn PDF document text
    • http://furniture83.com/upload/files/buzapitudonafo.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/laduwezigosilijitolama.pdfIn PDF document text
    • https://senegal4d.com/contents/files/dekisodep.pdfIn PDF document text
    • https://agatanorek.com/files/file/52832089959.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/2fe44265a27eadcc42c5663f1794c1a7/wuxanevixubararu.pdfIn PDF document text
    • http://klhl.com/userfiles/file/wefopoz.pdfIn PDF document text
    • http://cowmoo.org/ckfinder/userfiles/files/sugorejamebojivip.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///37089924101.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/a898e96dd5272aa5187f8893d129844e/42000213353.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/zajififuvidew.pdfIn PDF document text
    • https://webmedcentralplus.com/userfiles/file/wefegidi.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_off0000d43e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43E 10908 bytes
SHA-256: 6e7ac6fe860296627dc8dd1948388bcf4b89564347546163819f98a5dcabeda5
font_01_sfnt_off0000edc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC2 18180 bytes
SHA-256: a3853782f4c41d303804b874c5587680ec825884baed6b7e5076b6200e5053e8
font_02_sfnt_off00011bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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