Malicious PDF — malware analysis report

Static analysis result for SHA-256 a08a8df2d2120cb5…

MALICIOUS

PDF

73.2 KB Created: 2021-09-03 11:17:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 80a3bb25f762bf03069d5b05190976ec SHA-1: 4b4a5e0d1026850ff36148f317adb336fa1bb984 SHA-256: a08a8df2d2120cb5306840bebb94c61d0f5ce3057cb7fb0639379026b182a39d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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://thementalhealthadvocates.org/files/userfiles/file/85317932541.pdf In PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/419e9d99cc3ef698ecd25f036268c49e/pabifezigirefafin.pdfIn PDF document text
    • http://designbeginnings.com/upload/file/gorerezus.pdfIn PDF document text
    • https://stayinbranson.com/ckfinder/triplebuserfiles/file/vajenugerodumagavoguwit.pdfIn PDF document text
    • https://www.hkha.com.hk/ckfinder/userfiles/files/raxodelag.pdfIn PDF document text
    • http://synphabase.ch/upload/file/dotiguko.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8f0c02e6b1---55620840329.pdfIn PDF document text
    • http://rauvuonsach.net/images/uploads/files/rufufuv.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a2bd41733---59271100472.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/39546510424.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1c114d4ae---pebato.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/sewolevixadi.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/dd76040vvcgm8h05ktfg9ej8cl/xafatotaxeporaxakudalux.pdfIn PDF document text
    • http://astmasme.com/userData/board/file/81225593407.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/83946347848.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/zonefusamudejikipi.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ab764bd6680---77502943827.pdfIn PDF document text
    • http://didopack.com/files/52995548825.pdfIn PDF document text
    • http://salespate.com/userfiles/file/40936262182.pdfIn PDF document text
    • http://electriccityusa.com/images/fck_uploads/file/35601129042.pdfIn PDF document text
    • https://clarkfamilybuilders.com/home/clark/public_html/ckfinder/userfiles/files/45390190751.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/fojosegafejoj.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/36ee3f9d39666ad621d7db4b8c81848b/lumubasigoguve.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/zibaweropokebawiget.pdfIn PDF document text
    • http://gndpta.eu/news_objects/files/99025829193.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f09a7ff86---gibepixamarasawikubevupoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=letter+m+flashcards+pdfPDF 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_off0000bb2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD341 17036 bytes
SHA-256: 65553b389a38e16270f3e855d69be67449071a6f1ae28a0e9ec9589e5f73f047
font_02_sfnt_off0000ff1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1E 10524 bytes
SHA-256: 1927ebb6802038cfaff2039dc4f8bc05b235db0f2cff372ea5970aa20ab30d9d