Malicious PDF — malware analysis report

Static analysis result for SHA-256 d279c63fe4a3b208…

MALICIOUS

PDF

86.2 KB Created: 2021-09-16 12:20:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2ec297bf6f8020b068b549873fd4b39a SHA-1: 5bd0232b3f9c4f52a2fe6adfeaf7eda3729adc13 SHA-256: d279c63fe4a3b2086471c137952b3229793f44358c7377940547355f000d553c
196 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a 'Clipboard command execution lure' heuristic, indicating it instructs the user to copy and paste commands into a shell. This is a common technique to trick users into executing malicious code, likely to download and execute a second-stage payload. The document also contains numerous links to potentially compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://bio86.net/userfiles/fichiers/10918276558.pdf In PDF document text
    • http://chornakorn-packing.com/ckfinder/userfiles/files/wudenedesapupova.pdfIn PDF document text
    • http://joesservicecenternj.com/userfiles/files/45216910319.pdfIn PDF document text
    • http://kondicionery-himki.ru/upload_picture/file/83846593416.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/161407b52bad72---12411717368.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/44311188762.pdfIn PDF document text
    • http://tostonet.cl/ckfinder/userfiles/files/1265823457.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/munovutadegutixosen.pdfIn PDF document text
    • https://ketex.com/trcgp/ckfinder/userfiles/files/zovep.pdfIn PDF document text
    • https://rowsontw.com/shopadmin/upload/files/26047836748.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/28473754413.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141d0bba27f5---velumamobulusemamogo.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16132142ac9ac8---51487954501.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16142408b61fdb---82616988747.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16139f6d6357f2---velipukenut.pdfIn PDF document text
    • http://valsadindustries.com/userfiles/file/jeguwadaporiropebode.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/nedate.pdfIn PDF document text
    • https://mallorcaboom.com/res/wysiwyg/file/2574892677.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613ba40d7ee5f---fuxugadukifa.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16136d601dc540---xojegesalu.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4fdc2bbda---mozerifasizarukafixobuxu.pdfIn PDF document text
    • http://dietaltop.com/userfiles/files/22288014756.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/zugoreturofizelonuvow.pdfIn PDF document text
    • https://bucatariizidite.ro/printuri-fi/files/13382268776.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/85975673394.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/lfplo7r7dqpr4red9q6pi6k346/86364203255.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=one+code+for+ios+and+androidPDF 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_off0000e683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE683 20128 bytes
SHA-256: c2c32203b4cfaac8c9e63a1216db3ec1b10b2b1fcdcc46cc74f7ef8202b8179b
font_01_sfnt_off00011ba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133BD 10348 bytes
SHA-256: acad219f268ea688eb2314035cd647491ffc2e37a3263fc548ff4691be989e80

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