Malicious PDF — malware analysis report

Static analysis result for SHA-256 d88814609cd3fa2c…

MALICIOUS

PDF

81.9 KB Created: 2021-09-09 01:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f748370e4320efad485c5673714ae356 SHA-1: 748ac762c9a9e7d40021008aee1ded3bfc41a2ad SHA-256: d88814609cd3fa2c2e16f677707d757403dad9bf2395f94945f37584a3253d83
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm designed for SEO poisoning or phishing. One URL specifically mentions 'real credit card generator with real money', indicating a scam or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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 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://archism.ru/uplcv?utm_term=real+credit+card+generator+with+real+money PDF link annotation
    • http://scandirent-new.ru/uploads/assets/file/25385611740.pdfIn PDF document text
    • http://hanabi-la.com/uploads/files/mizuke.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/hs6ke626iuqg3fvr6usrf39296/1001813695.pdfIn PDF document text
    • http://ideal-site.ru/userfiles/file/85145477203.pdfIn PDF document text
    • http://fijiembajak.com/uploads/ck_uploads/files/52593131272.pdfIn PDF document text
    • http://cheumst.com/upload/fckeditor/file/70282697992.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/tepoxajuvevuzimuvu.pdfIn PDF document text
    • http://sh-songshi.com/admin/upimg/file///97408403596.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/13393626412.pdfIn PDF document text
    • https://laser123.com/geektic/files/punar.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16134d817668ca---60325640354.pdfIn PDF document text
    • http://snuhonors.com/userfiles/file/fixepepozumojejugonilap.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/bowatorobepunejinu.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/talezox.pdfIn PDF document text
    • https://cian.hr/userfiles/file/xaginutevefofudosan.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/16860511332.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134eb390829d---47911065936.pdfIn PDF document text
    • https://duvarkagidierzincan.com/userfiles/file/81286767838.pdfIn PDF document text
    • https://kawanmto.com/contents/files/gesotejitigeguseta.pdfIn PDF document text
    • http://aqua4you.hu/userfiles/file/94269830160.pdfIn PDF document text
    • https://tagoproperties.com/ckfinder/userfiles/files/buzevugisobexiloziwofabo.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_off0000d9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DF 10896 bytes
SHA-256: c195e745f3fb3271d9433bd59e70713ab585516355ef8f2ce89086e8f4588da0
font_01_sfnt_off0000f2b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B2 17416 bytes
SHA-256: a4ac81b8ce645bafd60671488d31ef5e38109ae8a95ebd300c11870c6c779e21
font_02_sfnt_off0001200d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1200D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1