Malicious PDF — malware analysis report

Static analysis result for SHA-256 5089a3314dc9cdc0…

MALICIOUS

PDF

80.0 KB Created: 2021-09-11 00:18:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ad8d78fd4ed2780f69219b5d0a54b3d7 SHA-1: 07e4f9a8ef7c8f2d63527b87de95bccd70fad935 SHA-256: 5089a3314dc9cdc05a413b4f46d6e95cfca83cb9ba00bdd269ee6ee8b9ee0a66
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external sites, suggesting a phishing or credential harvesting campaign. The PDF structure and the presence of external links are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://dailyiat.com/html_upload/file/jinejolo.pdf In PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139b84dd5664---rowinikiv.pdfIn PDF document text
    • http://studiomalpocher.it/userfiles/files/16988269815.pdfIn PDF document text
    • http://dunakeszi.varosom.hu/userfiles/files/50723409598.pdfIn PDF document text
    • http://chieusangducphat.com/uploads/userfiles/file/44187383902.pdfIn PDF document text
    • http://slbreakingnews.com/ckfinder/userfiles/files/dasixesoxoji.pdfIn PDF document text
    • https://xeroxexpres.cz/userfiles/file/pedojivureno.pdfIn PDF document text
    • http://vit-physio.de/file/80084356448.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/vidl98t55k428mssrdmiv0b8t9/72517597863.pdfIn PDF document text
    • http://cnex.cc/images/blog/file/petobani.pdfIn PDF document text
    • https://goooinggroup.com/userfiles/files/20210910_211127.pdfIn PDF document text
    • http://xinxinhouseware.com/uploadfile/files/dawabepalamesulegipu.pdfIn PDF document text
    • https://gadesign52.com/uploads/files/202109050231471870.pdfIn PDF document text
    • http://aptekarynek.pl/zdjecia/fck/file/javalurusu.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/gofitava.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/84286319964.pdfIn PDF document text
    • http://capriololaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/41781317149.pdfIn PDF document text
    • http://wksx.top/images/userfiles/file/rigabelinugejogizafi.pdfIn PDF document text
    • http://i-p-p-c.com/ckfinder/userfiles/files/14788604506.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/67436754370.pdfIn PDF document text
    • https://careerroots.net/ckfinder/userfiles/files/81087941188.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/52992783009.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16131d301b73da---72783547211.pdfIn PDF document text
    • http://cn-noah.com/uploadfile/file/juzulumu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=2005+mustang+v6PDF 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_off0000d620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD620 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE37 10576 bytes
SHA-256: 5ac420a05a90ad747826c00606a93c36eddb384f961b75e1adab01696cef3f53
font_02_sfnt_off0001067b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067B 17112 bytes
SHA-256: 3b738031c84bfbdbf33f35d587ade3c6fa1d7c9e057c063ef91e287ebdf1f218

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