Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee8ab49f2e70e6ff…

MALICIOUS

PDF

69.5 KB Created: 2021-09-26 10:21:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 04f79a96af70c3c6c97c9270d0719645 SHA-1: 3299a176b1a77425eac98e37c79017a8d9a71d4c SHA-256: ee8ab49f2e70e6ff172c03ab448705e02664575d9571ab49b075addfbbb258c8
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains a large number of external links, many pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The PDF_IMAGE_LURE heuristic indicates it's likely an image-based document designed to trick users into clicking a hidden action trigger.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 7

  • 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 69 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.
  • 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://queure.ru/uplcv?utm_term=best+chess+application+for+android PDF link annotation
    • http://sanmorales.es/userfiles/files/bagomexonulo.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614db6f279a2b---kipewiretubutal.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/8209271726.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/duwizudakojubudaku.pdfIn PDF document text
    • http://kraemer-duennebacke.de/files/file/57372989772.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/161319f4747335---wofatipip.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/82504536005.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021091804471373499.pdfIn PDF document text
    • http://pc580.cn/upload_fck/file/2021-9-23/20210923133606379320.pdfIn PDF document text
    • https://www.hippocratio.gr/ckfinder/userfiles/files/boledivuxafogopimoba.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/55192182341.pdfIn PDF document text
    • http://csc0512.com/userfiles/file/20210904221115_lsc5gs.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/mavisagabokazej.pdfIn PDF document text
    • https://avukatwebsitesi.cicasoft.com/upload/files/29539111378.pdfIn PDF document text
    • http://artdealer.vn/upload/fckimagesfile/55656c7b90f08fbd58733aea9fdf86aa.pdfIn PDF document text
    • http://ttworld.hu/uploads/content_files/files/ganej.pdfIn PDF document text
    • https://atvatextile.com/upload/ckfinder/files/59535205179.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/3870048122.pdfIn PDF document text
    • http://ros.by/ckfinder/userfiles/files/pomodasi.pdfIn PDF document text
    • https://mgrenginiai.lt/ckfinder/userfiles/files/65056207157.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/xoponanorab.pdfIn PDF document text
    • https://bunianco.com/other_files/File/49067790372.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/ropimozuwaxexasitinigafe.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614fafbc6c993---43547463399.pdfIn PDF document text
    • http://floral-design-lindgens.de/userfiles/file/35213652822.pdfIn PDF document text
    • http://abcs.umontreal.ca/upload/files/zubuligigazifaguwipaveb.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_off0000b3ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3AE 14260 bytes
SHA-256: f59f0bce6e6baef36847dcd43a75726caf4243eb84bccc22ea1cf73e8b24ba60
font_01_sfnt_off0000d700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD700 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ef17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF17 10768 bytes
SHA-256: 54712d39b352d94ef4727789ad277f1f521cc189954389ccee36365d386ed565

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