Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3074565552d2898…

MALICIOUS

PDF

78.5 KB Created: 2021-09-17 14:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 275de643b65a522714b4a587dfd5fac7 SHA-1: 47a08e144af3eb51ae9415c5536eb0cec37eed3f SHA-256: d3074565552d289810e78d469a8e1e0f4a4e98a77506eee088dae7b0b7384dd7
126 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to suspicious domains, and one heuristic specifically identified it as a link farm. This suggests the document's primary purpose is to redirect users to external sites, likely for phishing or to download further malicious content.

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://nhatrangpalacehotel.com/app/webroot/upload/files/62972205232.pdf In PDF document text
    • https://haysalon.com/public_html/userfiles/file/3401411755.pdfIn PDF document text
    • http://leoclubmarsala.it/userfiles/files/rimejujumovet.pdfIn PDF document text
    • http://ibrahimabuomira.com/ckeditor/ckfinder/userfiles/files/tamoroga.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/bojelurodegududov.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ffc52a24b0---22275294521.pdfIn PDF document text
    • http://zlzljc.com/uploadfile/file///2021090412220480.pdfIn PDF document text
    • https://successalpha.team/upload/files/lodixulijawot.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/foxavojid.pdfIn PDF document text
    • http://giovanninociti.com/userfiles/files/79390000365.pdfIn PDF document text
    • http://yibetter.com/data/files/43837219757.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/373fb637b9249cb2ef22cdf4b7911839/90163399037.pdfIn PDF document text
    • https://mbbs.hr/files/limigetonatazuvi.pdfIn PDF document text
    • http://4darchitecture.org/img/all/bimonutulasefavod.pdfIn PDF document text
    • http://zjhywt.com/images/upload/File/53364394427.pdfIn PDF document text
    • http://air-con.ru/upload/files/23577920168.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/rizuwopejonesegulugugakix.pdfIn PDF document text
    • http://webinaris.blog/ckfinder/userfiles/publics/files/35928358169.pdfIn PDF document text
    • https://standsimulator.com/ckfinder/userfiles/files/bazugedafejideruginuzap.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/fuvodivixabewinivi.pdfIn PDF document text
    • http://sportsbettingconsultants.net/cote_dor_import/admin/ckfinder/userfiles/files/jipabojevisomiteponubegas.pdfIn PDF document text
    • https://plasy.com/uploads/file/wasutavimuju.pdfIn PDF document text
    • http://hak-al.com/resimler/files/25726966229.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=sniper+assassin%27s+end+streamingPDF 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_off0000ca8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8D 18780 bytes
SHA-256: 4bc544e35171fc1a12a964515265badd8bfd6ee58836b32aa3e10f5aece99efe
font_01_sfnt_off0000fbb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB6 10676 bytes
SHA-256: ad8c95a8d2edfbc7938370cad9af73256321819dfedef8afc50885b55c780cd3
font_02_sfnt_off000113fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1