Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d9e0e99fdaa5f8a…

MALICIOUS

PDF

71.8 KB Created: 2021-09-07 07:34:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 68268deeaf2a7a240b6722ed7cfa7b92 SHA-1: c76b49e5547286fc2fc95819410f88ad45aafc21 SHA-256: 0d9e0e99fdaa5f8aca07a0e0b92ba35650fe01855a1a2801da7fa86a336a3fd3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Several heuristics point to the PDF containing a link farm hosted on compromised or disposable domains, suggesting a phishing or malware distribution lure. The presence of external URIs and a link farm structure indicates an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://artasedanasingaraja.com/uploadfck/file/89528146018.pdf In PDF document text
    • http://mlight.cz/archiv/file/kesuzisokiferud.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/1v07f6e1kmhrvjrjmp1oupd537/fulufuwitokumunodipad.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2f99a20aee---dikizefixara.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/66326048447.pdfIn PDF document text
    • http://heizler.hu/files/file/gibonuwixadevutiwami.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/rgge5tnl7npht23iio6iu1bi51/19160955307.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aae3595785a---xuwameturibenemoreravoriw.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611465030ae7b---botosulusowisuk.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/97136437177.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/panojumit.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210701000747_87gkgb.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c70d848b8---dugubojefenazaxalumapuxi.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/9c47890f931c979f9de165fc14a82cc1/74307730940.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16109860053163---fugakivadig.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/vunonivasat.pdfIn PDF document text
    • http://physocare.com/Images_upload/files/pufuwediwelivuxun.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/0759b121c21e9df1d14e48feaa9e1704/lurunenofaluzuf.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e415f51014---pitolowomised.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/8109a9c7dd10af86b71f5af115ea6d1d/xasefikixezerafokizuzalav.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/45700371674.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610bd3646fab1---90712981601.pdfIn PDF document text
    • http://calzaturificiocatia.it/userfiles/files/52363233622.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/88786098552.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=pdf+size+converter+mb+to+kbPDF 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_off0000b6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6E9 16192 bytes
SHA-256: 45984edb32e2e66968c5e8a207ddd9e54e5000310f04b7e841c4545da6be904f
font_01_sfnt_off0000e0cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E4 10788 bytes
SHA-256: 38870b5e8e0e0ca31ee80827d6020bd248f50fc59ac7398557f5c05987570291

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