Malicious PDF — malware analysis report

Static analysis result for SHA-256 32eee8c0f81e744e…

MALICIOUS

PDF

68.6 KB Created: 2021-09-24 22:05:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1d669a232763e7d66405cfb4df14934a SHA-1: ebf6842c5954bee4587073ef03d1bf3d618431f0 SHA-256: 32eee8c0f81e744e2e68bf9a44716bfaa13be42d7df2bfae1f42f2f844671c1b
184 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The document contains embedded JavaScript and numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious content. The 'Image-only document with action trigger' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://topp.pl/_topp/file/41719238958.pdf
    • http://bargiel.com.pl/ckfinder/userfiles/files/satozevotoput.pdf
    • https://colakcivi.com/userfiles/file/21949991665.pdf
    • https://cottingham-group.com/cufiles/files/6517657633.pdf
    • http://agt.es/files/galeria2/files/22686989168.pdf
    • https://sogelec-eng.com/files/ckfinder/files/janosozoxasobejego.pdf
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/e14c2d7d3389596fdbde05c994f9983f/japegi.pdf
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/896b3a0707db09ae77678a9b8020dbdf/38308599575.pdf
    • http://msslink.ru/userfiles/files/kofizefivedabewi.pdf
    • https://apaman.ti-am.jp/js/ckfinder/userfiles/files/61188749419.pdf
    • http://fvv-hohenfelde.de/sites/default/files/files/vemiwikomef.pdf
    • https://ruxthai.com/ckfinder/userfiles/files/zaxepevudanajovapi.pdf
    • http://doremimarlikinsaat.com/userfiles/file/10623180348.pdf
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/49efd7abe1761b24184f3840c8c9563e/sakowupodap.pdf
    • http://lanaecoloridabruzzo.it/userfiles/file/23690003156.pdf
    • http://izumrud38.com/ckfinder/userfiles/files/67519452875.pdf
    • http://avtosfera28.ru/userfiles/file/31990301740.pdf
    • http://patronusalapitvany.hu/public_html/upload/29394006232.pdf
    • http://nigerseedindia.com/uploads/gadizinimimikenaka.pdf
    • https://mujeresenmovimientoplus.com/userfiles/file/54042712285.pdf
    • https://patoman.ro/ckfinder/userfiles/files/bomiwojeju.pdf
    • http://backkwang.com/userData/board/file/govunukexogunukapot.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=broadcast+text+message+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b0b1.bin
5425f6c0c78da8e8341e076e66679ce7539c2db441b41f14b22586cc05221aa1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0B1 14232 bytes
font_01_sfnt_off0000d40f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD40F 16792 bytes
font_02_sfnt_off0000ec26.bin
c47e55ffff818f0e89004f2abc145240df6d677385a1b317fef0b8810b6efa75
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC26 10824 bytes