Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bb596a8e906774c…

MALICIOUS

PDF

134.6 KB Created: 2021-08-15 14:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 5efef08ca9b965e3c0425e99aeb992c3 SHA-1: 56cfb2494febbaefe8896d67512aa3ad60fd9d41 SHA-256: 6bb596a8e906774c55577088038998ea61979adda9d381f71787a85686075166
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. The PDF contains numerous links to external websites, many hosted on compromised CMS uploads, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm heuristic strongly suggest an attempt to exploit users via redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/205f3319af6edd008215222c8d168ad9/31632622354.pdf In PDF document text
    • https://davidfoleyinc.com/userfiles/file/53681197804.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/disasa.pdfIn PDF document text
    • http://xn--h1agcmh.com/ckfinder/userfiles/files/farejizozuwow.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082059ce0ca9---kidenegex.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/72241a2cab9f2810be088cd095e791c5/86916142617.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098da0ad1ae2---11993294312.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4d4466a5e---vumajutix.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/mobozubamifozilaloxupe.pdfIn PDF document text
    • https://murtenhof.ch/userfiles/files/juduwofulojururaratel.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fcfa3a25093---wasewimaz.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813518b215a---kuduvizililivapovanola.pdfIn PDF document text
    • http://kbchina.de/upload/1216660122.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///92279892299.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160bb83d6d629e---69521683966.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/63634415759.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/usj1h5g20m3jkdelafre07uf57/34365224772.pdfIn PDF document text
    • https://ccichn.vn/data/upload/file/gabepagazuzesekixi.pdfIn PDF document text
    • https://digireg.si/upload/44343795830.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c27953ea0---65348022029.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/69219072503.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210717082903.pdfIn PDF document text
    • https://jurad.eu/files/file/mupijojamezuxifesu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=como+rezar+un+rosario+para+difuntosPDF 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_off0001a6bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6BF 10804 bytes
SHA-256: cbb43f7884607480e66a8f8c9057cf4682c5b7b900c0a6f3045ad18682e53457
font_01_sfnt_off0001bfb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BFB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001d7c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D7C7 20608 bytes
SHA-256: 6ba8569690f9cce917ba77265345419ee1c10964018faeacbb28a2e8a91f352a

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