Malicious PDF — malware analysis report

Static analysis result for SHA-256 204f2c340f196113…

MALICIOUS

PDF

80.7 KB Created: 2021-09-10 13:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3399ef6139caed0624e35ee485ea6429 SHA-1: fd7789d50578ddae9d67324304a857c3d4c75bd2 SHA-256: 204f2c340f196113bad09a9aca05b0558caccbb17cbb9216f271790a81a0d9f4
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. It also features numerous external URIs, many of which are part of a link farm, suggesting an attempt to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://icbacademy.com/upload/files/34397439039.pdf In PDF document text
    • https://ahha.az/userfiles/file/88924760838.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/45099864009.pdfIn PDF document text
    • http://strap.sk/uploads/files/32676491671.pdfIn PDF document text
    • https://icnj.net/ckeditor/ckfinder/userfiles/files/piwixuposigi.pdfIn PDF document text
    • http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/miletejugabud.pdfIn PDF document text
    • http://www.polni.si/Images/files/lejinadejisid.pdfIn PDF document text
    • http://abhinavabhishad.org/userfiles/file/morumixotu.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/nisabilaxeramu.pdfIn PDF document text
    • http://ogcdc.org/uploads/ck_upload/files/58637174680.pdfIn PDF document text
    • https://rmduncanrealty.com/userfiles/files/taxepetisej.pdfIn PDF document text
    • https://bkairconditioner.cloud4demo.com/uploads/files/52042047821.pdfIn PDF document text
    • http://recepti.plovdivweek.com/js/ckfinder/userfiles/files/31801588729.pdfIn PDF document text
    • http://geo-equipe.it/userfiles/files/jabokafomovul.pdfIn PDF document text
    • http://ipceurope.com/assets/file/97261472582.pdfIn PDF document text
    • https://unique-u.biz/images/uploads/file/15715563114.pdfIn PDF document text
    • http://e-junghan.com/userData/board/file/giwalededogetiwetuxi.pdfIn PDF document text
    • http://smartwealthhk.com/userfiles/99792178208.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16131fe5c14588---35194179856.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613501c494fd2---polifevuzefom.pdfIn PDF document text
    • https://yodishit.com/uploads/userfiles/file/sotewifibomidoji.pdfIn PDF document text
    • https://pielinks.com/UserFiles/file/96156521704.pdfIn PDF document text
    • http://ovecollection.com/royal/admin/images/products/file/kifodutetevulevupabagikiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=ball+rolling+game+unblockedPDF 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_off0000d7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F2 10832 bytes
SHA-256: 376ee29ca3bfa97dd56543bdcb47511341b932e989dadafc2d3b2f81602ee64a
font_01_sfnt_off0000f0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A8 16972 bytes
SHA-256: 2fd0b381af4dd9f864f5d2980511c0f271c4ea438c23a33660e810ae254388e2
font_02_sfnt_off00011cd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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