Malicious PDF — malware analysis report

Static analysis result for SHA-256 13b369c93565eb94…

MALICIOUS

PDF

70.8 KB Created: 2021-09-26 10:31:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 492866dd01392c745bf183a3abbdfa5a SHA-1: 6cfc7421e377c58078b5d2c16414efe7f5da44d3 SHA-256: 13b369c93565eb94209c727a04b5db694b85d6da62f01349b1c2456392b985dd
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external URIs, many on disposable hosting and using UTM parameters, strongly suggests a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://allytemp.ru/uplcv?utm_term=remove+app+from+firestick+cloud PDF link annotation
    • http://arndt-fahrschule.de/userfiles/file/megot.pdfIn PDF document text
    • http://sasolution.kr/userfiles/file/93296618501.pdfIn PDF document text
    • http://riviera.az/userfiles/file/vavutimegewov.pdfIn PDF document text
    • https://rm-parketi.si/uploads/zizigelik.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/lalumoxabavir.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613582b9266a8---sevofut.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/45550750751.pdfIn PDF document text
    • http://dobre-jaja.com/Upload/file/10261800817.pdfIn PDF document text
    • http://konditsionery-zheleznodorozhnyi.ru/upload_picture/file/vunutomafudogonoretivijox.pdfIn PDF document text
    • http://lex.tj/img/file/15755232346.pdfIn PDF document text
    • https://hanurichurch.org/ckfinder/userfiles/files/80359007048.pdfIn PDF document text
    • https://hoangphatdanang.com/uploads/image/files/60703093284.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202109102322312593.pdfIn PDF document text
    • https://aquarell.ro/userfiles/file/rarebalupul.pdfIn PDF document text
    • http://studioarclab.eu/userfiles/files/66423292669.pdfIn PDF document text
    • https://etevent.itweald.com/uploads/files/6135c2ce21a83.pdfIn PDF document text
    • http://busto-wl.gattinonimondodivacanze.it/themes/userfiles/files/85802677602.pdfIn PDF document text
    • http://heatexchangersolution.com/upload_fck/file/2021-9-20/20210920145433650453.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/sawurovadojeliwudomebo.pdfIn PDF document text
    • https://quimicasorocolor.com.ve/ckfinder/userfiles/files/voturo.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/dapologuvepokukug.pdfIn PDF document text
    • http://sporteambiente.it/ckfinder/userfiles/files/28665179744.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_off0000b13e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB13E 16828 bytes
SHA-256: 683b9edc04c4afcbe1c6e32741849bc6d612d275039e6571f464d76a0816b5bb
font_01_sfnt_off0000dbfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF411 10980 bytes
SHA-256: 95ed41a7e5bf2fb993fbbfefd78e74e148f14481aca42a6b8853f23db153508d

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