Malicious PDF — malware analysis report

Static analysis result for SHA-256 db88be64e297f457…

MALICIOUS

PDF

76.7 KB Created: 2021-09-19 21:06:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3cb4b66f868168082262b90069a90698 SHA-1: 7686a40d3e7f05911054eacd6c7499fe11eaf9f7 SHA-256: db88be64e297f4575b205adfbfa815db824c84379ae56482729f5e3dd3c326b7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains a large number of embedded URLs pointing to various domains, suggesting it functions as a link farm to distribute malicious content or phish for credentials. The document body is heavily obfuscated and unreadable, providing no direct clues to its specific purpose beyond the numerous external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://catamma.ru/uplcv?utm_term=ruqyah+saad+al+ghamdi PDF link annotation
    • http://altus.pl/userfiles/file/28880060728.pdfIn PDF document text
    • https://sikanderajam.com/Robinson/ckfinder/userfiles/files/11278420461.pdfIn PDF document text
    • http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/71094408002.pdfIn PDF document text
    • http://marleenjansen.nl/images/uploadfiles/jigusoximovolijotikofigox.pdfIn PDF document text
    • http://hoangnamjsc.com/upload/files/42966610527.pdfIn PDF document text
    • https://lotusmarinevn.com/upload/files/38828596450.pdfIn PDF document text
    • http://highspiritsmusic.com/ckfinder/userfiles/files/jufunakovomuwagewixozik.pdfIn PDF document text
    • http://thaisomboonautopart.com/userfiles/files/vatotav.pdfIn PDF document text
    • https://ikansambel.com/contents/files/fomomizalamabinujodav.pdfIn PDF document text
    • http://vasekurzy.cz/userfiles/file/daponojasudofomovufudu.pdfIn PDF document text
    • https://poldercuptrofee.nl/site/admin/ckfinder/userfilesfiles/goforufitilaferebawisabem.pdfIn PDF document text
    • http://tomgiongvip.com/uploads/files/file/64848575001.pdfIn PDF document text
    • http://kmconlinecme.com/userfiles/file/82978867602.pdfIn PDF document text
    • https://campermagazine.tv/public/file/79694418498.pdfIn PDF document text
    • http://btsoft.vn/uploads/files/34999082973.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/ac463bea63ad9466eb22e51ead3f4a18/luxejab.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143351f9aeb8---siwamamikulutugi.pdfIn PDF document text
    • http://worshipedia.mobi/sites/default/files/file/5199882264.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/84336549967.pdfIn PDF document text
    • http://toroisg.com/public/images/files/47231145549.pdfIn PDF document text
    • http://transcash.com/ci/userfiles/files/11249769086.pdfIn PDF document text
    • http://amicissiapiemonteisa.it/userfiles/files/97295194979.pdfIn PDF document text
    • 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_off0000c689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC689 18288 bytes
SHA-256: 47284dc6d48e6d1a0cd270811ff26207832d0c355ffb2212e99fc9d645cd03e3
font_01_sfnt_off0000f5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0D 10548 bytes
SHA-256: 040b529dd8a4d52ee6691c5af5652bbd5735e832c726924cdd96a9f5fdf8a437

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