Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c4c199717e50889…

MALICIOUS

PDF

86.4 KB Created: 2021-09-21 04:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f04377a21f49c561ae124ac09516ebf4 SHA-1: 8b15ee2f87f50f008da7eb4d44ab3bafb9265812 SHA-256: 6c4c199717e508890a8b2cedfeae0ea0a0521147aa038927be0ed316fb720d89
166 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. The 'SE_CLICKFIX' heuristic suggests the document employs social engineering to trick users into running commands, likely to download and execute a secondary payload. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing or exploit delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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
  • 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://splhardware.com/UploadFile/file/2021090305433973499.pdf
    • http://rydelko.pl/userfiles/file/bejexepujezadujo.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a43702d540---26574944838.pdf
    • http://pensionpoint.cz/userfiles/files/kubefojevur.pdf
    • http://freewest.at/natuzomewomefanepup.pdf
    • https://rm-parketi.si/uploads/fuxazemeb.pdf
    • https://leo.tw/upload/ckeditor/files/somutabugabotererelalu.pdf
    • http://medizator.ru/ckfinder/userfiles/files/gasozuzedafitatane.pdf
    • http://e-sportis.com/images/upload/32542312027.pdf
    • http://bernardthevenet.fr/ckfinder/userfiles/files/sizuvi.pdf
    • https://alharithiforcameras.com/ckfinder/userfiles/files/22246136668.pdf
    • http://www.macrolepidoptera.hu/userfiles/files/1298794293.pdf
    • http://nhatrangpalacehotel.com/app/webroot/upload/files/poninijuluw.pdf
    • https://segurodegranizo.ar/noticias/fckeditor/file/54746916825.pdf
    • https://bibonatura.hu/ckfinder/userfiles/files/31886317832.pdf
    • https://keongracun.org/contents/files/34768613121.pdf
    • http://yieldpharm.com/upload/files/48981972263.pdf
    • https://quizai.com/uploads/files/xilagupuxejafasug.pdf
    • https://muratay.nl/userfiles/file/lunusikifemozedavu.pdf
    • https://barcelonamedicalcenter.com/files/galeria/files/62900064012.pdf
    • http://flirdining.com/uploads/files/xidolomijazadezomelojo.pdf
    • http://perila-vrn.ru/userfiles/file/33541538321.pdf
    • https://atlastoursntravels.com/userfiles/file/7501648651.pdf
    • http://retailpark.bg/uploads/wysiwyg/files/56842579808.pdf
    • http://saltokisport.com/uploads/files/27652112511.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=ultimate+rotation+control
    • 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_off0000e797.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE797 16792 bytes
font_01_sfnt_off0000ffae.bin
6d5e131bdaf2e4ce15352dd573e36b4511b577dc3624609e9a89de3e2aabab4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAE 10228 bytes
font_02_sfnt_off0001168a.bin
c95564c40503267c6e01ca6fe82eb40ff39888225852483af50be7992c2a2fbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1168A 20344 bytes

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