Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecdb1e0752f1a6db…

MALICIOUS

PDF

79.7 KB Created: 2021-09-20 00:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: c633a6dd68a3a15b1cd968c276ca69dd SHA-1: 5b800d868677b1556ec16ab8af7074c8d02c6fea SHA-256: ecdb1e0752f1a6db716a5890f0f1f4848eb5b2a05a9895c9915ea7e9fecf7606
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous links, many hosted on compromised or disposable domains, designed to direct users to download files. The presence of a 'utm_term=download ludo king mod apk latest version' in one URL suggests a lure for potentially unwanted or malicious software disguised as a game download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bipalisdemo.dashindonesia.com/userfiles/files/lokasife.pdf In PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/89700408486.pdfIn PDF document text
    • https://amadesafar.ir/basefile/amadesafarir/files/38651097692.pdfIn PDF document text
    • http://kleinschadenexperte.com/userfiles/file/1094301877.pdfIn PDF document text
    • https://nevisnews.com/userfiles/zorogi.pdfIn PDF document text
    • https://majubesar.org/contents/files/bibajefor.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/46279691340.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/warogof.pdfIn PDF document text
    • https://fcksa.com/ckfinder/userfiles/files/vumovozevowuk.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/ririnalebefuliredik.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/tasijomitojumubi.pdfIn PDF document text
    • https://danielstrehlau.com/userfiles/file/6809584254.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613f2c83ae119---xuzal.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143b04d3a246---polaboxex.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/56938587617.pdfIn PDF document text
    • https://ixiu-23.com/uploads/files/202109060247392859.pdfIn PDF document text
    • http://cuacuonnhanh.vn/Images_upload/files/90077131921.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137b963c95a3---tunukosobebamawizuvexu.pdfIn PDF document text
    • http://ort168.com/upload/ckeditor/files/nelufaxatezig.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/regedakafanavozizureruz.pdfIn PDF document text
    • https://ciiinnovationsummit.com/ci/userfiles/files/xibebubazezolipetogopom.pdfIn PDF document text
    • http://paddockj.com/user_data/editor/ckfinder/core/connector/php/upload/files/51605028115.pdfIn PDF document text
    • http://gelateriacool.it/userfiles/files/79357018246.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/453e46fa55c62a732f2155880ba69dd7/81113951417.pdfIn PDF document text
    • https://glaskunstcentrum.nl/images/file/48533043590.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/notoxabeniderokijikewas.pdfIn PDF document text
    • http://bloodfaces.de/attachment/file/34964593346.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=download+ludo+king+mod+apk+latest+versionPDF 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_off0000d26b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA82 11080 bytes
SHA-256: 905aea6b7ab980248c76129a4a177e044f8394d762eb17d2c8bcb2d88e25c8c6
font_02_sfnt_off0001042b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1042B 17172 bytes
SHA-256: 9359d362b7c1c339140187ef8e1a143db886cea85b2a5792bb4c9535c2f0ff04