Malicious PDF — malware analysis report

Static analysis result for SHA-256 eebb80309fbc6f3f…

MALICIOUS

PDF

85.1 KB Created: 2021-09-20 11:11:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 26ba33734ee891cbb4b33e0ecc1cbea3 SHA-1: eb8ae4ccd1a0e2d85cebe4a88d7c2ea91a26f24b SHA-256: eebb80309fbc6f3f04dcd1044f23a185c3dcd45dc0247eb1fdfc45ac6af30d76
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript 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 presence of a link farm on compromised CMS uploads and disposable hosting, coupled with urgency lures in the document, suggests a phishing or malware distribution scheme. The embedded URLs likely serve as entry points to download further malicious content or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://colleges-in-tamilnadu.com/FCKeditor/userfiles/file/97767484286.pdf In PDF document text
    • http://md-servicios.com/userfiles/file/xopelenajufizi.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/letuxiterutolipabemidi.pdfIn PDF document text
    • http://sciattella.net/images/file/53916304247.pdfIn PDF document text
    • https://mimpisiluman.com/contents/files/sekopomo.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/wozeba.pdfIn PDF document text
    • https://krusomying.com/data/file/naxuluwogazaginatutira.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142165156412---wezegal.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/161342717f0718---lumewubem.pdfIn PDF document text
    • http://fujieshubao.com/zk/UploadFile/file/2021091213050273499.pdfIn PDF document text
    • https://pingthye.com/userfiles/files/tavagi.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/161313d3c3313b---67752623603.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/dofejuvivadilezesabemo.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/runufexipig.pdfIn PDF document text
    • https://semut73.com/contents/files/85724896802.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/21768119352.pdfIn macro / runtime command snippet
    • http://www.mecateengenharia.com.br/ckfinder/userfiles/files/zamimebotudarawigipesus.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16136ee7560bbd---47423450371.pdfIn PDF document text
    • https://specializedfacilitymgt.com/public_html/userfiles/file/7667255577.pdfIn PDF document text
    • https://ximangcampha.vn/upload/files/29008953446.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/5d29fe671542d35350752a7fc1f3226e/pabegepujebowijezatedij.pdfIn PDF document text
    • https://magerp.org/upload/files/dekikonudopeve.pdfIn PDF document text
    • http://contelex.it/userfiles/files/kejopipelabometalubojesa.pdfIn PDF document text
    • http://nenayu.com/filespath/files/20210905013157.pdfIn PDF document text
    • https://semut73.com/conIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=app+to+read+articles+to+youPDF 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_off0000e6c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C7 10600 bytes
SHA-256: 2c40deb52c8fd04a941aa60eee436f85e9d350343a5b982c54c8406849f7f77e
font_01_sfnt_off0000ff27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF27 18212 bytes
SHA-256: f558157022b848f07e79566875447ce7124e430c2de1bbe9dd3efb05f7248b0f
font_02_sfnt_off00012ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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