Malicious PDF — malware analysis report

Static analysis result for SHA-256 54f80a3d4265f2d8…

MALICIOUS

PDF

76.1 KB Created: 2021-09-12 17:55:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: a7d114adeffc26e30a15b8bba4df2d6e SHA-1: 92942b4c268092cb19c6a45c6219481ba56ec7a1 SHA-256: 54f80a3d4265f2d838dd391b445d420f1c79915e0b30686572317289764ec202
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to potentially malicious PDF files hosted on various domains. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests these URLs are part of a link farm designed to obscure the true destination or spread malicious content. No scripts were extracted, but the presence of multiple external links strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://le-bouquet.be/userfiles/files/genurefaku.pdf In PDF document text
    • http://scpt.it/userfiles/files/20757909337.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents/files/13929917736.pdfIn PDF document text
    • http://hanifeugur.com/image/files/sixatofulibemutorudimilin.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/62067228876.pdfIn PDF document text
    • http://lnhaihui.com/userfiles/file/20210901083638_512207911.pdfIn PDF document text
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/53776838388.pdfIn PDF document text
    • http://adhdesign.de/userContent/files/20210906135351-71155302501.pdfIn PDF document text
    • https://prawobrzeze.info/userfiles/file/79891228190.pdfIn PDF document text
    • http://gccde.com/downloads/blog/geust/files/tifaguforevegotejegin.pdfIn PDF document text
    • https://festivaldelmaridaje.com/sgi_userfiles/userfiles/files/57380476354.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/13929500974.pdfIn PDF document text
    • http://parentini.it/userfiles/files/18718745694.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/nitukale.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/33561425802.pdfIn PDF document text
    • http://thesei.com/In PDF document text
    • https://euchebnici.com/img/file/xokel.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/75644977744.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/ruwatudeburijujejolol.pdfIn PDF document text
    • https://open-call.fr/uploaded/files/rorom.pdfIn PDF document text
    • http://bakineshr.az/ckfinder/userfiles/files/86728392348.pdfIn PDF document text
    • https://paperland.bg/uploads/file/raxejabuximuka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=how+to+save+to+sd+cardPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC751 16968 bytes
SHA-256: 853e1a1dfdef8d10e2dcde664edf8f4100c5dda896509af7aa830cb283f9d175
font_01_sfnt_off0000f346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF346 10264 bytes
SHA-256: ffc94d9ca2eef62557dd5d8f4ae0e98b720566c64aefd4eef7006957fe8241bf
font_02_sfnt_off00010a84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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