Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb009a22641beda…

MALICIOUS

PDF

90.4 KB Created: 2021-07-27 18:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6058b6788a92d1b8efeca5f7132c5ec7 SHA-1: 193272790b191d5e8eaf959f5eeda5940ee16b21 SHA-256: eeb009a22641beda0d64c0cecc5c2f2bd87dd3a1549669b0ac5bb04c785e82a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/c2ec9bc0e68976f026274cd80a1e9acc/zetotat.pdf In PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/479597a9e5d8e6d7bcf9c54ee3ae1acf/6909761881.pdfIn PDF document text
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/57839476580ed644deb86623afa638ad/didasolejopoxokibe.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160923831ab78f---23652236651.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/3m5e7ao6fuuapur89m688mr8b4/xutoxorekefexug.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8ed15f6c1dd7706e2563f2a8bcc64545/xabepusuzanotexiz.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160b42818360a4---karagiw.pdfIn PDF document text
    • http://sciattella.net/images/file/lezuwurudobo.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/dipedidakaliramuxizega.pdfIn PDF document text
    • https://study-abroad-travel.com/ckfinder/userfiles/file/9356938412.pdfIn PDF document text
    • http://livestocktool.com/d/files/49864812401.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/1466530864.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/femirezebino.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/9acaa752b5917d837976cb32c7879085/79858992681.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/3rj5ntcu71qf2br3sr5tp23rmv/75549663416.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/02ffp4qsn6oaps9m3nqmgppu62/zunuvigigiriredevej.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/nujexesodibofevamabebofis.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/2818a11bd5dfcd36d64ab87cb1c5e403/62954036141.pdfIn PDF document text
    • http://autoscuolauniversale.it/userfiles/files/kogokijulokuvalalox.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/18679011226.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/40ee92413ded238f309423401f1400f5/sedomidapabobode.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/b2e5c344ed59be4ea879741d61727ff3/76861420799.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=contemporary+world+history+5th+edition+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_off0000fd2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2C 16816 bytes
SHA-256: d430b948129d4bf638f8b8734fc7c03cdbd947f490116063374dc405087d1146
font_01_sfnt_off000128b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B2 11128 bytes
SHA-256: 7033ee0791416f4ff2cb78a658785309c8853090c4ab672409777b60fadbfa56
font_02_sfnt_off00014293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14293 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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