Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b2c7380faf926c…

MALICIOUS

PDF

106.1 KB Created: 2021-09-07 14:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 7f18f42c986d640720d1f5db58df7524 SHA-1: acfea0afea96f2f9eec834bd7b8d124eadff1a1e SHA-256: 06b2c7380faf926c6c9093fb51dc4c3698966b978f1d14b8da5cc14cac609196
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous URLs pointing to compromised WordPress sites, suggesting a link farm designed to obscure the ultimate destination. The presence of multiple PDF files hosted on these compromised sites indicates a distribution mechanism likely intended to lure victims into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c41c7497fd6---mozelanominazivasa.pdf In PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16081b94b76151---97480182098.pdfIn PDF document text
    • http://edanieltour.com/FileData/ckfinder/files/20210621_052A7630A58A97EA.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/c3f14f41c20180d3f5c08f78a30a06f3/budevewaradalagogofagek.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/kefemenibavemuzagakowopo.pdfIn PDF document text
    • https://cecprint.com/images/file/2446419385.pdfIn PDF document text
    • http://mestav.sk/uploaded_images/file/30677592489.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/obbo0cjgnuhgv3fr197963ukfd/kimebumifonizupus.pdfIn PDF document text
    • https://doctornhospital.com/banglanews24/editorsfiles/files/8337898771.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/8062417218.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fb838d781---77255575745.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/75845738029.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/ccd21493f5c6296b4393f3dbf5d56b2d/tesagididu.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cc2f8f6619c6453d74152cdbf9e79af6/nafunejoxi.pdfIn PDF document text
    • http://aotwresort.net/ckfinder/userfiles/files/bajifizudinukir.pdfIn PDF document text
    • https://goldfieldssanddrags.com.au/ckfinder/userfiles/files/ralekewodoxaruti.pdfIn PDF document text
    • https://rubenoferro.com/userfiles/file/14186815816.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/0ba9ce90439953c331fcada984e72a3f/81562439742.pdfIn PDF document text
    • http://kruengrangthai.com/files/files/95846595013.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b48384328d2---fevate.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/90521657009.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/25320388886.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=fuzzy+controller+design+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001356f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1356F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014d86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D86 10884 bytes
SHA-256: e6b3151ec626eb61a42a9f1d0123ccac3a6b0961ac5cb4c8c1938e876026a28a
font_02_sfnt_off000166aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166AA 19744 bytes
SHA-256: 791814d12d9404d210f9d51731b571d943f8f02d217908237220a73b2a1dbcb6

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