Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a03347fd941f998…

MALICIOUS

PDF

100.3 KB Created: 2021-06-30 17:11:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4096700f2e094163f5f61e7f9f8fee4b SHA-1: dd80b78f1967e31f53f47097a2d8534bb31d08f0 SHA-256: 0a03347fd941f9980733ba824a22017a5b1c96a1f83b60fff3cb0e6975cce935
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, suggesting it's used as a link farm to redirect users to potentially harmful content. The presence of external URI heuristics and compromised CMS upload links further supports its role in a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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 http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607d396a7dacd---wetijubikifeto.pdf
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/goben.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d78d903bc---zejirinop.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/7baa4278ca014455c6fe336509dc3e5e/kuber.pdf
    • http://bocghedanang.com/media/ftp/file/49359413794.pdf
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/40b57afa13013f3c07d624fe2f6e99c3/famifovujutekogalim.pdf
    • http://prodottoitalia.eu/userfiles/files/60101295256.pdf
    • http://lubrifianti-auto.ro/files/file/kijuxapafopajogujaxo.pdf
    • http://rainbowcaterers.in/userfiles/file/gavexoxezukatatik.pdf
    • http://unseenadventure.com/userfiles/file/jexedeboxexisitutaxowuvo.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d4d42c400c7---jaxovum.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/7cbe41a9df753ad6967cdd2f1107d6b7/70067850003.pdf
    • http://learningkey.org/userfiles/naduwelaxadufum.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/7g8i5cojk19ctm34p01dgtlob2/91977308576.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/f988d4b0a2b363f2b8ed0d62339f5bbf/vimuf.pdf
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/1rbmi4ejp05c21tr352ajdcq57/33969523840.pdf
    • http://fw-simple.com/uploads/files/radirijutabuno.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609017ec7abc5---33112285388.pdf
    • http://extracam.es/app/webroot/arxius/file/65135959759.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/202ae15178167b9bdbf067b35971ffaf/gazuj.pdf
    • http://hakkabrothers.com/userfiles/file///levopowufalefawifi.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16075dc7f8e83b---17014501533.pdf
    • https://bjjewels.net/nbloom/fckuploads/file/xolegogavosij.pdf
    • https://llsindia.in/FCKeditor/file/vosadexexuderu.pdf
    • http://unsersohn.ch/images/file/wezadijiwegagawakafuk.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=the+mentalist+online+streaming
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000125da.bin
00223b22c1932d239aef54e1edba6951ac33703224336049c018c73ff1cadca6
pdf-font-stream PDF embedded font (sfnt) at offset 0x125DA 18516 bytes
font_01_sfnt_off0001542f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1542F 16792 bytes
font_02_sfnt_off00016c46.bin
fc3d21a2ba2ba89408a9bb3958e129274782f54247ce99b561dddb71118dd1a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x16C46 10516 bytes