Malicious PDF — malware analysis report

Static analysis result for SHA-256 2990327fbe1c732f…

MALICIOUS

PDF

72.3 KB Created: 2021-09-12 15:22:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6a1d8b641ec3801902ec332c3af2f9e4 SHA-1: 31d6d9059211cfe7ebe0adc513929f193c3d4833 SHA-256: 2990327fbe1c732fe19de55e1211705c2b776c23d1af3f5b7856e0bec6e28358
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains numerous embedded URIs, with several pointing to IP addresses and disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://jyjwqj.com/uploadfile/file///2021091206485017.pdf In PDF document text
    • http://hebammenglueck.de/ckfinder/userfiles/files/xuwakiramewisavepunifozi.pdfIn PDF document text
    • https://ever.dacola.com/upload/files/pofod.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/jvsvj47l1vdd2ui5hdlgaqm4s0/bodofexovapukukenifopa.pdfIn PDF document text
    • http://narzedziascierne.eu/Upload/file/juravexurojunetipurikas.pdfIn PDF document text
    • http://liqaa-lb.com/files/userfiles/files/bamalaxizegifagekomaj.pdfIn PDF document text
    • http://de.ruben.pl/ckfinder/userfiles/files/88516262377.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/tibusuzuwubowilukuf.pdfIn PDF document text
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/9327495747.pdfIn PDF document text
    • http://cyuansheng.com/userfiles/file/3831452755.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/45039524723.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/vepifosotigura.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/7019550205.pdfIn PDF document text
    • http://185.33.116.142/~bbyacht01/upload/files/11263435579.pdfPDF link annotation
    • http://agedwedfjtj.pretty-match.com/upload/files/25231496960.pdfIn PDF document text
    • http://benrassam.com/uploads/files/48767773329.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/356337928ce74450d4b1a3c82544ff87/29913251271.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/povijufulavumawimodezu.pdfIn PDF document text
    • http://officegate.biz/admin/fck_upload/file/47272030876.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/bexowapujej.pdfIn PDF document text
    • https://rcot.org/userfiles/file/puzamonur.pdfIn PDF document text
    • http://autosklo.sk/pictures/file/dujidebodisagupadadum.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/nukoji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=aurora+live+wallpaperPDF 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_off0000ba51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD268 10108 bytes
SHA-256: 96d5957c28a5706e32e7654f9c26801eede051bf41344a768368ede4785cae45
font_02_sfnt_off0000e920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE920 16676 bytes
SHA-256: d37ef1d12f268997e1d320a9ed739207e30cebab15f3362357870dade242fafe