Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bc6bdbbb0d80d08…

MALICIOUS

PDF

79.2 KB Created: 2021-07-27 08:14:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 68dd547dff010f9e838f2a70283c97b9 SHA-1: f296e3ee33f93ed3643b3087c7aaefaef43495ad SHA-256: 0bc6bdbbb0d80d08e8e6f183cdc3852f4383d568c397cfbe4a65510992b4182c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an "enable content/editing" lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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 http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5d5edac847---vodasaxel.pdf In PDF document text
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mojulojunimexilufuvi.pdfIn PDF document text
    • http://ayurvedicclinic.org/userfiles/file/fupebifevo.pdfIn PDF document text
    • http://mooneyes.pl/userfiles/file/14612951490.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ce95abbc0---rototuzojuwepopobalu.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/d4a688e8bda17595f1fc2a145d7f4177/16004269552.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0690d1b93---migutuvikometo.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/nufizorenaxetegugis.pdfIn PDF document text
    • http://tuccifamilyonline.com/clients/b/b5/b5aed9f4ae8fd2b300021b46b426cae6/File/43321701114.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/91802bed170ca2d1417c105ab104c095/74428930321.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/gpm7gi5tc2r7bvn27gkfe7boc8/zakujetinetisudekuvedew.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/hocnjfbimuh0c2ularbcf69s27/sikuroxasozip.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083f8da08771---jobevije.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/808a1cb483ae39b768db125b2435262b/34891750658.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0a55c233a---bamawakitegapoduzanigaviz.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/22477445fdcb2bcb1c70c5d9a00fc5cc/32563345461.pdfIn PDF document text
    • http://zuche0551.com/upload/file/36562619577.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160867360e6622---pinodojiluzezenozefop.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/38118446556.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/zuximapikatomujenunig.pdfIn PDF document text
    • http://bigband-ulm.de/userfiles/files/73778651604.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/8ooqu1rojdb4k9sogs4itde5f3/xekanijowe.pdfIn PDF document text
    • http://sunnysideclassof64.com/clients/a/ac/acc4ccb49d7935ca36198347b895393e/File/vipepelodob.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/tudumejorojuzabuduxor.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/561eb61d8a5d932310c7f2d56e24f00d/93199948174.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/99334600460.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=microsoft+excel+2016+book+pdf+free+downloadPDF 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_off0000d1d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EE 11488 bytes
SHA-256: a50139add4711fc5fe14a003bf965cbf3a3bf2ea223452971f99b086f6ae893f
font_02_sfnt_off0001052f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052F 16056 bytes
SHA-256: 033138a094945c468d6319614b1857b93181a95b05b1324996b7d033405dacc7

Open this report in the interactive analyzer, or submit your own file for analysis.