Malicious PDF — malware analysis report

Static analysis result for SHA-256 aafb517aa9dee7ee…

MALICIOUS

PDF

80.0 KB Created: 2021-09-10 20:15:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 548026d2763c79355e27fce995be2f52 SHA-1: d4599cc4e30cd2fcbd2366a088feade56b4ef94b SHA-256: aafb517aa9dee7ee7fa71087b4c78dabda8b45d9a54cbf79140169ba3f0296e6
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links pointing to disposable hosting, suggesting an attempt to obscure the final destination and potentially host phishing content or malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wlpp.net/images/blog/file/86851848272.pdf In PDF document text
    • http://agataklimowska.pl/userfiles/file/savoporaka.pdfIn PDF document text
    • https://cvsc.co/userfiles/file/misumopawatawuzazirowu.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/pevido.pdfIn PDF document text
    • http://agierresrl.it/userfiles/files/7174899941.pdfIn PDF document text
    • https://pielinks.com/UserFiles/file/fefewumuba.pdfIn PDF document text
    • http://carnow.jp/js/upload/files/zanumefebunuvugukuri.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/12985809517.pdfIn PDF document text
    • http://dobre-jaja.com/Upload/file/96537387509.pdfIn PDF document text
    • http://evolutionchonburi.com/userfiles/files/81158399829.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/30221579751.pdfIn PDF document text
    • https://asesoriagade.com/app/webroot/files/files/17081666657.pdfIn PDF document text
    • http://music-summer-courses.eu/upload/files/56575721061.pdfIn PDF document text
    • http://tetrafluoro.com/upload/files/jalivizilo.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/f268e2a4119d38c4b3470cb5c39eabd9/migomodaka.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/0558068a2ba04cb109990d36c6c946a8/88510344961.pdfIn PDF document text
    • http://studiotrusso.it/userfiles/files/8078986064.pdfIn PDF document text
    • http://betheaskssd.com/flash/betheaskssd.com/file/falunujeji.pdfIn PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/baxufuvamaxu.pdfIn PDF document text
    • https://rumusjitu.com/contents/files/68052462240.pdfIn PDF document text
    • https://munis-roquesalbes.cat/demo/vilalba/imatges/file/rezawuwasemimowopatemu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=grand+gangster+hack+apk+downloadPDF 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_off0000d221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD221 18072 bytes
SHA-256: 855d135252395fe16a05d827072f9cc0687f1652f3a465e6b727c5e157f2f4e5
font_01_sfnt_off00010120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10120 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11937 10920 bytes
SHA-256: 830eafd9ec756b9c7fd1f6f4a1195d2fb91061a9478c60044543ff0a65a26adf

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