Malicious PDF — malware analysis report

Static analysis result for SHA-256 48c5001db2a08894…

MALICIOUS

PDF

83.3 KB Created: 2021-09-12 01:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 11743cbb6e495852b4d25094db305975 SHA-1: dc2669a626243c6f378dd85a858445253ce6e4d1 SHA-256: 48c5001db2a08894c04a2f72203e6686054a4bb68d1d27960fdc15742771404b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs users to copy and paste content into a command-line interface, a common tactic to bypass initial execution restrictions and download further malicious content. The numerous embedded URLs, many hosted on compromised or disposable domains, suggest a link farm designed to distribute the actual payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://fotofolliasanlazzaro.it/userfiles/files/83816508803.pdf In PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1cbc286f5---9842256982.pdfIn PDF document text
    • https://tierrettung-in-katalonien.org/ckfinder/userfiles/files/76906496470.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/34418224143.pdfIn PDF document text
    • http://zdravi-kromeriz.cz/files/file/luwetabuxasuge.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d14b976bb2---24747662280.pdfIn PDF document text
    • https://kitchensofdiablo.com/upload/file/supitun.pdfIn PDF document text
    • http://xfswchem.com/upload/files/53914686106.pdfIn PDF document text
    • http://moriefrusca.com/userfiles/files/86247775225.pdfIn PDF document text
    • http://magnumprint.ru/upload/files/40220384080.pdfIn PDF document text
    • https://cli-kh.com/uploads/files/202109080646389749.pdfIn PDF document text
    • https://spyboarcams.com/files/rivodetuvudofupow.pdfIn PDF document text
    • http://zzps.pl/userfiles/file/72466326061.pdfIn PDF document text
    • https://sealand-pptc.com/userfiles/file/nanezomodimewake.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/varobuvizomuxu.pdfIn PDF document text
    • http://csc0451.com/userfiles/file/20210904125738_cyp1xg.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/sojajusosimotane.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/pizimigukizisozule.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210902093414171.pdfIn PDF document text
    • http://hausdergesundheit.net/userfiles/files/dakezifiwuvanowonivuz.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/rodun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=xiaomi+mi+a2+lite+custom+romPDF 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_off0000dee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F6 18664 bytes
SHA-256: c404fc307fd5c7a23ac4b2c9b3db743e0c012512e4e37850d6ce6aadce818dae
font_02_sfnt_off000127a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A8 10512 bytes
SHA-256: e389f3eed4bcd9fb48ef1cb9902481fb5b9a77c6c4aec7cecd391f40b4a7d969

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