Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ee0354cd8adba1e…

MALICIOUS

PDF

68.2 KB Created: 2021-10-03 11:24:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: a687070211859b24c6ede69aaf8052e5 SHA-1: 38d9501654b30c02a007eca01babad843d8c6aca SHA-256: 2ee0354cd8adba1e24ca245e9723db238d20805aaa50639f7e11236b01c4d4da
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to suspicious domains and are structured as link farms, suggesting a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the use of disposable hosting and UTM parameters, reinforcing the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613f501784ad3---sozovuv.pdf In PDF document text
    • https://samsunyapi.com/userfiles/files/bezomopisozonolo.pdfIn PDF document text
    • https://shiokuda2.com/contents/files/68165616939.pdfIn PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/61245372056.pdfIn PDF document text
    • https://chiuman-hk.com/images/file/wiwureluzojatok.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/filuxixerireduzuku.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161392f009523d---12693666548.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pojuzexi.pdfIn PDF document text
    • http://enovosti.info/ckfinder/userfiles/files/dibodupag.pdfIn PDF document text
    • http://german-ex.com/images/blog/file/52133209906.pdfIn PDF document text
    • http://kingswaytyres.com/project/kingsway/uploads/file/74220922763.pdfIn PDF document text
    • https://mb-classic-service.de/userfiles/file/37598810268.pdfIn PDF document text
    • http://musicfriend.vn/public/default/ckeditor/files/zafelutojusirepazivaxem.pdfIn PDF document text
    • http://zimmerei-possert.at/wusunipuso.pdfIn PDF document text
    • http://ksiclub.org/projects/achievemore/admin/upload/fckImages/file/fetamodonusimiwamagekaliv.pdfIn PDF document text
    • http://matsusushionline.com/uploads/files/25087281319.pdfIn PDF document text
    • https://tennis94.fr/img/pics/files/suzezus.pdfIn PDF document text
    • http://siripanyalamphun.com/user_img/files/72737680747.pdfIn PDF document text
    • http://9y.bfage.com/upload/files/20210906014411.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=the+meaning+of+metabolismPDF link annotation
    • http://cluster006.ovh.net/~greeters/namur/ckfinder/userfiles/files/64384990037.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_off0000ac37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC37 10664 bytes
SHA-256: 9226b4a35c0a407799dc0983f3e74fa70c7adca97d7092ff20bed4c64f431a76
font_01_sfnt_off0000c46f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC46F 15504 bytes
SHA-256: 003371c1d857c2b7985652297859e8ca08859bf1c2ebc326cec766e74da8504a
font_02_sfnt_off0000ebb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1