Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b618135414f580c…

MALICIOUS

PDF

75.1 KB Created: 2021-09-16 09:09:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 826296d51f07ba03b465c020df155490 SHA-1: d2df8ce538ef8313edcd033661d73da2401555a9 SHA-256: 3b618135414f580cb35c29015ec3fdc9138b95e58bb8729e902d5e449275b693
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. The PDF contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm designed to redirect users. One notable URL, 'https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=download+shadowgun+war+games', appears to be a lure for a game download, potentially masking a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure and URL patterns are consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://majubesar.org/contents/files/vojiwukib.pdf In PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614222d18ac1f---18451544430.pdfIn PDF document text
    • http://skipjackpoke.com/ckfinder/userfiles/files/40439378413.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021090608574055.pdfIn PDF document text
    • https://sunriseinnjasper.com/nbloom/fckuploads/file/51283357025.pdfIn PDF document text
    • http://sushibelovo.ru/files/35435226425.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/39727512918.pdfIn PDF document text
    • http://hidropro.hu/upload/66397847836.pdfIn PDF document text
    • http://bestorkate.com/uploads/ckeditor/files/dulup.pdfIn PDF document text
    • https://luathoanghuy.com/uploads/files/78956897933.pdfIn PDF document text
    • https://fetogram.ir/images/upload/files/dutimujuvevibadeda.pdfIn PDF document text
    • http://www.yevres.fr/ckfinder/userfiles/files/dazebaguvusiteruguzaluj.pdfIn PDF document text
    • http://www.clc-engineering.com/siteuploads/editorimg/file/setosejigovibomavirada.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/161315500d7ac5---47942757998.pdfIn PDF document text
    • http://bradzo-ep.com/uploads/files/xobiwafaliwogogifefumid.pdfIn PDF document text
    • https://srmhomes.com/images/bulk_images/files/nurubizakitezi.pdfIn PDF document text
    • http://dwornawodzie.pl/userfiles/file/nexikadu.pdfIn PDF document text
    • http://akademibt.com/resimler/files/movapanitut.pdfIn PDF document text
    • https://dragonexpressml.com/userfiles/files/51764732140.pdfIn PDF document text
    • https://majubesar.com/contents/files/vaxepirovetaz.pdfIn PDF document text
    • http://www.psoevalledeabdalajis.es/ckfinder/userfiles/files/79494566896.pdfIn PDF document text
    • http://monterroso-construpuntos.com/campannas/file/69245959839.pdfIn PDF document text
    • https://vjlabor.pitscovn.com/uploads/Upload/files/3507305330.pdfIn PDF document text
    • https://wickedcheesy.com/images/file/jizogoze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=download+shadowgun+war+gamesPDF 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_off0000c2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB10 10692 bytes
SHA-256: 2295000c01c0ef2669d226af46050a4f51249361e8d2114c3b7e1d6242f2e4d2
font_02_sfnt_off0000f33b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33B 17116 bytes
SHA-256: 768b227a4bc74683a1eae7df2625e8866fe1fd233828480c5fae4ac5e74ed052