Malicious PDF — malware analysis report

Static analysis result for SHA-256 d63bb25db4e2bc59…

MALICIOUS

PDF

72.8 KB Created: 2021-07-05 09:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9350c5a36d4acda0077fc4aa1951462b SHA-1: 11f0785383c800b76089cb174060e9aae616c398 SHA-256: d63bb25db4e2bc59e924852fa0e6763f29c1bd38e7b5225e0650e697a2cd6feb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs pointing to various domains, many of which appear to be compromised WordPress sites. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification strongly suggests malicious intent. The primary goal appears to be redirecting users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://infrive.ru/uplcv?utm_term=sheltered+in+the+arms+of+god+dottie+rambo
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703fc3d0097---xomewep.pdf
    • http://standdominica.org/files/files/97077719058.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/epkbjkcqpu2mrpajqg3tfno4t3/18545704522.pdf
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/nabepetelekoxukebefijil.pdf
    • http://ptairsupply.com/userfiles/file/laxulukadobi.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/ad5e8dbaef0c69fb5e72e320a5fde45f/funatafabuvarikuko.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/afdb9ad3a863e95236da3895926674d0/nisoxonodotogasesowibula.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/f2fffb6f645ce19ad8d478064d8287f5/58159396143.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609abc00cb4a8---dadobenoret.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/5e956ec74e7728641a2d476bd18aa2be/42447334765.pdf
    • https://ikincielinmak.com/upload/ckfinder/files/mopimijawezodoriwa.pdf
    • http://mxagproducts.com/upload/browse/file/wumatavilazixovujuxadiduk.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/fnsoupqptt833ak7p34vbijr06/zaxozat.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/jfjn7eobe7sbjfkd80tibu9rib/22710803642.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc8b62f02d---botepipixododawurafafof.pdf
    • http://aokisuper.com/ckfinder/userfiles/files/77490786178.pdf
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f278110ecc---30885363575.pdf
    • http://bizbecho.com/pa/trainstation/uploads/image/file/91743009080.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607097e413db7---xijupawamepeforatusel.pdf
    • http://brandnewgoods.net/userfiles/file/82952877925.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/e4312f042ca645ecad8604cc67f56595/nokafabo.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/29a0c1d85262e077a026b155d786f982/komajagiwaratatarefesa.pdf
    • http://leebyenghun.com/new/upload/board/files/koxesarerukarijudif.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9d2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB9D2 16792 bytes
font_01_sfnt_off0000d1e9.bin
170bbfb7073a7f3c778897a1c7222f1fe0b17b6e3d0a6a0bc52495e1d1e3a94d
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E9 11016 bytes
font_02_sfnt_off0000eb19.bin
5d54753dd7d6d593f0ebcb1bd95d2878df19b6ee21b6988a4330089eeab5e28e
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB19 16476 bytes