Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdf7f9ae564897b5…

MALICIOUS

PDF

83.6 KB Created: 2021-09-21 04:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4cfa2c389ee51b194bb027cd86c45d82 SHA-1: 6efcf098eb7ed8d867cd3dbc13a8dd820d84fb57 SHA-256: cdf7f9ae564897b5775a3175dec9981cdbf6139ffc5e15e310641938f9295d46
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The 'SE_LOLBIN_RUN_COMMAND' heuristic suggests the document text may contain obfuscated commands or paths, potentially related to executing malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • 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://smidgel.ru/uplcv?utm_term=ispoofer+install+ios PDF link annotation
    • http://biolabsrl.org/userfiles/files/jezurobajajivofubiji.pdfIn PDF document text
    • http://bikipvuikhoedep.com/app/webroot/files/editor_upload/files/96798751862.pdfIn PDF document text
    • http://hbaoge.com/upload/files/42376484592.pdfIn PDF document text
    • http://qdcmd.com/data/files/fogixawesuxezopoxu.pdfIn PDF document text
    • http://vucert.vn/uploads/files/sorojenadexofipifuka.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/sawobalizir.pdfIn macro / runtime command snippet
    • https://maymac.info/userfiles/file/25537436639.pdfIn macro / runtime command snippet
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/710e51c73eb48d8450c7ca4dee5f8d5d/waxolerekevev.pdfIn PDF document text
    • https://nwdglobal.com/ckfinder/userfiles/files/42920247952.pdfIn PDF document text
    • https://firsatpin.com/calisma2/files/uploads/jikogukizuzokap.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/76836703603.pdfIn PDF document text
    • https://livnica-metalurg.com/images/pages/file/molepasuz.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/161351ebd7fca8---rasewowam.pdfIn PDF document text
    • http://salamatekhanevadeh.ir/ckeditor/files/files/70399810145.pdfIn PDF document text
    • https://karatenarrewarren.com.au/ckfinder/userfiles/files/zizisogar.pdfIn PDF document text
    • http://budaikepkeret.hu/uploads/file/33395858374.pdfIn PDF document text
    • http://futuralagoparking.eu/userfiles/files/ponik.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/dalipulujenepafo.pdfIn PDF document text
    • https://dolaodong.com/userfiles/file/65129981282.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16142cd1fafce0---11093884071.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614914e3d3805---vunefijena.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/2be3f4311435458aa62c61b9d4b8c364/53369364897.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/96688194534.pdfIn PDF document text
    • http://vucert.vn/uIn macro / runtime command snippet
    • 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_off0000defb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFB 10304 bytes
SHA-256: 4c579dc4711eabbe88a4420d584cb43b770c8e36ee1216096155f00485c27a0c
font_01_sfnt_off0000f64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64B 19492 bytes
SHA-256: 581bfb1fd196a05e9e92596a795e20f618ead58b65b39ad70aa731e9b631b77a
font_02_sfnt_off000128d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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