Malicious PDF — malware analysis report

Static analysis result for SHA-256 fabd60e47f7da784…

MALICIOUS

PDF

79.3 KB Created: 2021-10-06 18:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 72c1859d53c723d7c7a2eaf69cc3a5a2 SHA-1: 94a8b07b826b6be21ea58defba9ae7ab9730fe32 SHA-256: fabd60e47f7da7846ced1d4b58a07d94f9efc92baa5a993dc6b9e0885f8a5272
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of embedded URLs, many pointing to unknown or potentially malicious domains, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is used to host many links on disposable domains. No scripts were extracted, but the overall structure points to a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://pernambucoimortal.com/imagens/files/sibinefogotonujotarefeg.pdf In PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/o9vg8sd5p7cv1rgv2uec1kfij6/44636227802.pdfIn PDF document text
    • https://sushixusa.com/userfiles/files/rovuboxoxemoz.pdfIn PDF document text
    • https://htcpost.vn/vietpost.vn/img_content/file/mekopenawejunuzi.pdfIn PDF document text
    • http://dkmmotor.com/files/userfiles/file/muvukowatelulabuke.pdfIn PDF document text
    • https://walnutcreekguide.com/wysiwygfiles/file/36968982301.pdfIn PDF document text
    • https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/guvajopat.pdfIn PDF document text
    • http://hnfhdc.com/UpLoadFile/2021092315080397747.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/lanow.pdfIn PDF document text
    • http://didongsinhvien.com/upload/files/88705644288.pdfIn PDF document text
    • https://www.ijdsir.com/ckfinder/userfiles/files/93659061150.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/xegurifafotepofisifare.pdfIn PDF document text
    • https://cdmsig2.com/ckfinder/userfiles/files/finorikijusifo.pdfIn PDF document text
    • https://mm-podium.ro/userfiles/file/larisirumidefo.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/65615709620.pdfIn PDF document text
    • http://nriloan.jctoursandtravels.in/files/xubokabelafebaz.pdfIn PDF document text
    • http://lepixz.com/userfiles/file/xidobidu.pdfIn PDF document text
    • http://uzks.hr/upload/datoteke/56754422996.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/sijugenut.pdfIn PDF document text
    • http://idominjazz.com/fckeditor/userfiles/image/85902254011.pdfIn PDF document text
    • http://bangdinhphucat.com/quangbasanpham/app/webroot/upload/image/files/65367314048.pdfIn PDF document text
    • http://biosite.ru/images/news/file/5063202134.pdfIn PDF document text
    • http://ingore.cn/upload/files/31025119551.pdfIn PDF document text
    • https://servauto.fr/img/user/file/62410818426.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/c02c1d7e9de1194c4edf650d2cf10328/53252829226.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+remove+a+watermark+from+a+pdf+documentPDF 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_off0000d493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD493 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA5 16172 bytes
SHA-256: febfeb759943898e0596cd3a7325b3cf8933fce5c7855ce28bacaa1500b20ea9
font_02_sfnt_off00011662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11662 10812 bytes
SHA-256: 0c3cd65554e0144d41fed72315f884a35348a6c13a35d20e7796672eff58e189