Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6225cdb573b5fb7…

MALICIOUS

PDF

71.2 KB Created: 2021-09-18 15:12:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7bd304a72c0b1458b6f863d8db73774c SHA-1: caf898beced679bc9aeeee126e751cc30df3b1ef SHA-256: c6225cdb573b5fb7ce1f4187d4024fd45f72a46b8efcf8a8f1af890a9134f8a7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document's primary purpose is to host numerous links, likely for phishing or malware distribution. The embedded URLs, despite some being marked benign, contribute to the overall suspicious nature of the document as a potential lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://gptools.net/userfiles/file/zenoratiwejirapodosi.pdf In PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/80222719097.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/78999173486.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/d342b06c40e168199aef5ee59710b737/giwejivuj.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/zegesavuzogo.pdfIn PDF document text
    • http://rootbeadmill.com/upload_fck/file/2021-9-11/20210911142725806474.pdfIn PDF document text
    • http://tiszaladany.hu/upload/file/46010664017.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/66297536796.pdfIn PDF document text
    • http://dzirerealtors.com/uploads/62760655727.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144efa4af82c---tupatixazojoke.pdfIn PDF document text
    • https://interference.ajoda.eu/userfiles/files/durubiwujisovalaragototam.pdfIn PDF document text
    • https://ises.ca/phpsites/vertical_living/uploads/file/bosokak.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/wivitosulevato.pdfIn PDF document text
    • http://gmkms.net/upfile_editor/2021/files/wazugizadaketidoduxi.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/bijonuzuvetazudo.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/dubadoxolelome.pdfIn PDF document text
    • http://toyotarent.hk/FileData/ckfinder/files/20210908_033659A06E7E341A.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/63203124753.pdfIn PDF document text
    • http://afslab.asia/upload/files/fupeperekokitawe.pdfIn PDF document text
    • https://marblo.com/app/webroot/img/files/61259879886.pdfIn PDF document text
    • http://jaluzipro.ru/public/userfiles/file/vuvaburuwife.pdfIn PDF document text
    • http://myphammonly.com/luutru/files/86417142073.pdfIn PDF document text
    • http://taiwan-casters.com/userfiles/file/40881697406.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=supernatural+season+7+putlockerPDF 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_off0000b7ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD003 10592 bytes
SHA-256: 135314766f68d21e7fd29f602a2683d29c91a0b48b744c4f5898888dee1c5ade
font_02_sfnt_off0000e866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE866 15124 bytes
SHA-256: 90dee3200c6731b27c175058a30106874b1d11d5f64ce9ffeefe49f873e58bc5