Malicious PDF — malware analysis report

Static analysis result for SHA-256 baa9ef25702f58ae…

MALICIOUS

PDF

83.2 KB Created: 2021-09-05 06:21:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ffc6569728eb0b50a4911fd59e0be9d5 SHA-1: ec77c29e1640e0b41e7b4ad5ffb77036d2f7a44c SHA-256: baa9ef25702f58aed77dc7d5a466cd6832ab9c5e24c304013e0d1511709a4d64
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure itself appears to be a link farm, designed to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.highlandernepal.com/assets/ckfinder/userfiles/files/62016929844.pdf In PDF document text
    • http://eprdel.cz/userfiles/file/somusalobebujovaxexadefe.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/2d2c47c92b21abf0c6284654538a7e5d/teveta.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa7a0a334fa---judafodoguvaguzuzaxoj.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/31264419960.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160ca0e15558cf---fukemewatemukezelet.pdfIn PDF document text
    • http://www.centralperdana.com/file/nepaforoko.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/1382724116a7c5805b8e767b865e82b3/kesexemupidib.pdfIn PDF document text
    • http://zzquansu.cn/d/files/79438610701.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa9d5f0da5---13338661058.pdfIn PDF document text
    • http://taxplus.in/images/contentimages/files/vijapisilawelalab.pdfIn PDF document text
    • http://teacherandtraining.com/coj_u/KK/userfiles/files/33293729420.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/57563753216.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/kokafomovolarukufiz.pdfIn PDF document text
    • http://houselandia.ru/files/72815957411.pdfIn PDF document text
    • https://pasarantogel.com/contents/files/9767707111.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16086e70b30481---61260117425.pdfIn PDF document text
    • http://netflor.pl/upload/File/39622467106.pdfIn PDF document text
    • http://sbox-technology.com/upload/datoteke/74685110789.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a589c62aabb---4092400061.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607731371cb72---89523842502.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/91170053970.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/36569698812.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/30388213757.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16125da2d91f2a---28842490403.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/3898228623.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=manual+guerreiro+da+luz+pdfPDF 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_off0000de30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE30 18824 bytes
SHA-256: e3ebf49cd1c8b339468ac4f619113633f681d76a682f212ff0fc8ab5a0caa104
font_01_sfnt_off00010ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF6 10560 bytes
SHA-256: 4696ddd0b0f09d8ac11272f014d24d278ff8c4cceeeb67032b6ff9898866c555
font_02_sfnt_off000126e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1