Malicious PDF — malware analysis report

Static analysis result for SHA-256 44300919fa2b7a72…

MALICIOUS

PDF

82.3 KB Created: 2021-09-06 20:24:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 209d92c219ef23b7a247760f1f229824 SHA-1: bd794338930a0412742603a6c5c1d9d6ad9449f0 SHA-256: 44300919fa2b7a7239c8c642b73f699fae80a40e582e5d38afa53d9356446848
196 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The 'SE_CLICKFIX' heuristic indicates a social engineering attack that instructs the user to execute a command, likely to download and run a second-stage payload. Several URLs were extracted, some pointing to compromised CMS upload storage, suggesting a distribution mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://chambres-hotes-aube-bleue.fr/userfiles/file/40771559690.pdf In PDF document text
    • https://signika.pl/Upload/file/72104857022.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c703c71398---lobomalivawapax.pdfIn PDF document text
    • https://lexcochoralsoc.org/demo/lccs/beta/userfiles/files/74818737684.pdfIn PDF document text
    • http://oasishs.com/uploads/files/20210904_100941.pdfIn PDF document text
    • https://marblo.com/app/webroot/img/files/87456416176.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160afaffeb8f6d---semifobamunexe.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/laserumixuxepasovebupudas.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/3969148997.pdfIn PDF document text
    • http://cs-web-design.de/ablage/userfiles/files/99962303702.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/setixipumifamujikagovete.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/wojolenekuresasuneru.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/52336543118.pdfIn PDF document text
    • http://robvancampen.nl/userfiles/file/taxopezigigagisonaku.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160edc5b6a723f---nijexoduxewutarebaz.pdfIn PDF document text
    • http://soldresold.com/Shradhdha-Mehra/soldresold/final/ckeditorimage/files/vozabujepoxenuvitirom.pdfIn PDF document text
    • http://cmtdental.com/upload/ckimg/files/mumuxepi.pdfIn PDF document text
    • http://timnhanhonline.net/upload/files/lutizoxebizisu.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/59790512709.pdfIn PDF document text
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/mekakanonojilasufusezib.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871a346e0db---97445248248.pdfIn PDF document text
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/zegovika.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210524020056_1214159770.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/9lmvtkieb737smnlosn3fp9v33/jujajobigaduzov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+electronically+sign+a+pdf+document+windowsPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/fee9dedf9b9aef1889721584cb910c69/6931993720.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_off0000dc1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1B 17432 bytes
SHA-256: 8d73885216089c7aa95b115e9b8bb5718f577b11025bed1778fa4dca036ae441
font_01_sfnt_off000108a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A3 11252 bytes
SHA-256: 638151ffdbdfbd375aa16988dd17db942dbb882508b8aa35df3d23d7a8280251
font_02_sfnt_off000122de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.