Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f80b5cecad4c2b…

MALICIOUS

PDF

87.6 KB Created: 2021-09-09 03:00:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0b4c81b2cecec1419480873a96e8997c SHA-1: 184322ffef05f43e399f1022ef5d9549870b2bb8 SHA-256: 30f80b5cecad4c2ba25dcc636fcae890e66dc18feb0b07d8ce3917d6449035f0
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 are flagged as disposable or potentially compromised. The ClamAV detection and ML classifier strongly indicate maliciousness, consistent with a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • 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://thaibamboorestaurant.ca/phpsites/bard_ford/uploads/file/36034648628.pdf In PDF document text
    • http://alpinist.store/sribati/editor/uploadfiles/pekobizosajipuf.pdfIn PDF document text
    • http://sabaispa.net/userfiles/file/27438865975.pdfIn PDF document text
    • https://elperrocallejero.info/ckfinder/files/pokufumi.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/jezebotedunixesovuwiba.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/i50qviurg3qqcgrh6464vd0qf2/fozifotinavepezidisi.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/vovanakisumo.pdfIn PDF document text
    • http://axi-hohenstein.de/userfiles/file/96114902585.pdfIn PDF document text
    • http://dulwichtaxi.com/survey/userfiles/files/faxakawes.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/14883005213.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/tudovovepaw.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138376eebc8d---67183433220.pdfIn PDF document text
    • http://ugyvednok.hu/userfiles/file/42379881233.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/susuzajoribizu.pdfIn PDF document text
    • https://inprovitpuertorico.com/ckfinder/userfiles/files/72809217328.pdfIn PDF document text
    • http://ksklinika.ru/ckfinder/userfiles/files/dixigabuxefav.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///58236792052.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393eda3d6d4---57112538682.pdfIn PDF document text
    • http://mudrberanova.cz/userfiles/file/vizima.pdfIn PDF document text
    • http://polishingmarblefloor.it/userfiles/files/gojirewutixomor.pdfIn PDF document text
    • http://punaide.com/userfiles/files/81544970043.pdfIn PDF document text
    • https://nguyenthelong.net/userfiles/files/13737153911.pdfIn PDF document text
    • https://hexema.com/FCKeditor/file/52619194476.pdfIn PDF document text
    • https://dolmalatrek.com/userfiles/file/sigipadujez.pdfIn PDF document text
    • http://planbmedia.hu/files/12625339886.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=gravity+run+cool+mathPDF 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_off0000f46e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46E 17172 bytes
SHA-256: 2f2db1f8257eb0f4c033e9c3eb14b776c4c8bc09e43c9cfb5a75535cc3c8bf3b
font_01_sfnt_off00012125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12125 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001393c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1393C 10516 bytes
SHA-256: 3bbc0db9e64067be4a795d489e1843b50ae6fb694179696925aa2e0ff0212063

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