Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eb2ed24de1f90de…

MALICIOUS

PDF

75.5 KB Created: 2021-09-15 21:21:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2de4440008d6e765dac54f882a50f50b SHA-1: 8b013868c312f7b577e04a16a8aa08c9a3850f71 SHA-256: 2eb2ed24de1f90de7b0440682f64066b290336e4cf20fdbeb7e15f8847231481
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution lure. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external links and the nature of the heuristics point towards a malicious document, likely delivered via spearphishing, that redirects users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://garglob.ru/uplcv?utm_term=how+to+install+latest+version+of+mobdro+on+firestick PDF link annotation
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e67954892c---92996559281.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/a104f5805ef029b50c2ffa2574c9b787/gabovigevi.pdfIn PDF document text
    • http://parzenica-bialka.pl/userfiles/files/10167485883.pdfIn PDF document text
    • http://sarljarry.com/userfiles/file/kokozakikomevo.pdfIn PDF document text
    • http://ayrh.internet-match.com/upload/files/fenowalokepavexutotezigub.pdfIn PDF document text
    • http://likuidart.com/files/ckeditor/files/89769035770.pdfIn PDF document text
    • http://bdpq.hungminhits.com/files/uploaded/files/1749121661.pdfIn PDF document text
    • https://sportuna.be/ckfinder/userfiles/files/duxaxiradumatanawizim.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/10370251285.pdfIn PDF document text
    • http://brno-skoleniridicu.cz/ckfinder/userfiles/files/toxidatasofigarezurozonim.pdfIn PDF document text
    • http://dentali.cz/files/files/71640763134.pdfIn PDF document text
    • https://coil.hk/upload/files/wurekesikel.pdfIn PDF document text
    • https://songod.vn/uploads/image/files/bolurofudakowutukaru.pdfIn PDF document text
    • https://nomaquito-travel.com/editor-images/kozaboditipetora.pdfIn PDF document text
    • http://greenld.com/userfiles/90561624355.pdfIn PDF document text
    • https://2b3la571ga-70p.com/contents/files/munetozorigopibobiva.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140cd3101382---2277964282.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133b1cb10b11---fonarikixovaxununa.pdfIn PDF document text
    • http://ambulatorioveterinariocigliano.com/userfiles/files/92486862191.pdfIn PDF document text
    • http://tumakuruvoice.com/tumkurvoice/ckeditor/ckfinder/userfiles/files/75263794100.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16131c569c091c---jumetanibo.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109071949076516.pdfIn PDF document text
    • https://pinyardim.com/calisma2/files/uploads/razakavapafomuxatawaja.pdfIn PDF document text
    • https://autonoleggioassereto.com/file/35831683344.pdfIn PDF document text
    • 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_off0000c109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC109 11012 bytes
SHA-256: 501e859446e17f96ab82be63beeb635bd1050673c2e29189bf47b6e67329f4f4
font_01_sfnt_off0000daa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA6 17772 bytes
SHA-256: 9bf51c093ce493e600d737f222fcd03ee42fec465cae8d134b780f2a60770f47
font_02_sfnt_off00010797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10797 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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