Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba8b2824dc0403e6…

MALICIOUS

PDF

74.8 KB Created: 2021-09-17 17:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c22c3058de00ecc4c17f6df456802544 SHA-1: dfa8fe30295f28353a10351f043fa1795e77485a SHA-256: ba8b2824dc0403e67dceffa17c199449b6d25706c8b1b043e2f54677bb437e27
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to disposable hosting or compromised CMS uploads, indicating a link farm designed to redirect users. The presence of external URIs and a link farm structure suggests an attempt to lead users to malicious websites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://www.scsk12.org/policy/files/files/37884171713.pdf In PDF document text
    • http://dymenahealthcare.com/upload/fckeditor/file/xugulobemegeni.pdfIn PDF document text
    • http://bjsddesign.com/filespath/files/20210917215715.pdfIn PDF document text
    • http://www.egymast-segito.hu/uploaded/fck/file/beminamenexanexadikufimol.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/91158561131.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202109030101282170.pdfIn PDF document text
    • https://jungleflightchiangmai.jungle-flight.com/Uploads/files/86884023617.pdfIn PDF document text
    • https://indiachristian.org/uploads/files/pixepugosavoral.pdfIn PDF document text
    • https://gkatsov.com/userfiles/file/39777137502.pdfIn PDF document text
    • https://sanruouvang.net/images/uploaded/file/83419471897.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/420bfe74349d5927163075ce4a7cea14/63720652796.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613c503dc9fc8---lasovilezozezage.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5e4c29ebd---dezisosidawenaro.pdfIn PDF document text
    • https://hoatuoi360.vn/uploads/files/3769262595.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/97732882979.pdfIn PDF document text
    • https://prettygreekvillas.com/admin/fckeditor/editor/filemanager/connectofile/89542064296.pdfIn PDF document text
    • https://profix.fr/ckfinder/userfiles/files/wigafupo.pdfIn PDF document text
    • https://careerroots.net/ckfinder/userfiles/files/rasot.pdfIn PDF document text
    • http://ptktent.ru/userfiles/file/nokezujeludazofid.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613499a8727fe---671587875.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/pm3ib0nugut9apmsj427pum6s3/60762237655.pdfIn PDF document text
    • http://www.moyekolodin.com/files/46836636834.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=legally+blonde+musical+soundtrackPDF 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_off0000c123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC123 11116 bytes
SHA-256: 2e02445cd795a67b62fb5596917853fd5f39c39341c7f52137f19c446192b3a7
font_01_sfnt_off0000dade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f2f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F0 16448 bytes
SHA-256: 589f31565a1c85ee644c28feb1582f9258fb5297184eeba0a343b508fc1dc4fc

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