Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f5d64a001a407d…

MALICIOUS

PDF

79.7 KB Created: 2021-09-19 13:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 49386a89ac6b910cc2f9f01b24844851 SHA-1: 33a147a43ecbb0f0f88b3b14183af06ee1d978d8 SHA-256: 02f5d64a001a407d6d3d1fcb3421bdb29c218b756028f8e2405bf064a65118e1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, many pointing to disposable hosting and disguised as software downloads, suggests a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate it's designed to trick users into downloading 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 https://garglob.ru/uplcv?utm_term=download+minecraft+pocket+edition+versi+beta
    • http://hawaiianhunareiki.it/file/pefobofovorasorevuvew.pdf
    • https://apgr.eu/UserFiles/file/bajid.pdf
    • https://phunhai.net/upload/files/binopofaliletila.pdf
    • https://basealimentare.it/webroot/files/fck_uploads/File/fenojujijuxaridobob.pdf
    • http://multi-accueil.fr/ressource/site-image/files/laxevaxogobapa.pdf
    • http://colorfusion.us/admin/images/file/sotapizupaxoxigarej.pdf
    • https://aldwalia.com/userfiles/files/61245001382.pdf
    • http://sourceit.ke/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/kajus.pdf
    • https://dafelia.com/files/jexubuxoriforimazagid.pdf
    • http://sibmaxi.ru/userfiles/file/nojugirimemutukuw.pdf
    • https://alcc.c-zentrix.com/ALCC/mail_attachments/multitenant-ws-01/1/1630906369.pdf
    • http://architettodrabeni.it/userfiles/files/nisediv.pdf
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/19396499063.pdf
    • https://akilanews.com/ckfinder/userfiles/files/webekigowimalemulem.pdf
    • https://lochoanggia.com/upload/files/tasevam.pdf
    • http://leeharringtonhomes.com/userfiles/file/juwamurepimawotuvuvamufo.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1511eb54d---36270356966.pdf
    • http://euro-ex.net/images/blog/file/67989171600.pdf
    • http://spamsmsgiare.com/media/ftp/file/41946738405.pdf
    • https://sevenhillsgroup.net/ckfinder/userfiles/files/4737299514.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/4926f0fe2ac903d1f7fbdec4f02fad70/48453894528.pdf
    • https://fivetc.net/uploads/files/mudalobuzajo.pdf
    • http://www.pilatesyoga.hr/files/files/nivesivegozurakomutotij.pdf
    • 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_off0000d0c9.bin
952791970cf5439b55c1dd1037855febda519e2de7101f142f4fde70eb335c16		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C9 17868 bytes
font_01_sfnt_off0000fee2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE2 16792 bytes
font_02_sfnt_off000116f9.bin
bb6ad2a96902605eae7164da50d7069060447cf9ffb95fdbe9664718fc28c7b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116F9 11164 bytes

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