Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c6826a0e4a6a89d…

MALICIOUS

PDF

71.7 KB Created: 2021-06-17 16:52:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: a8c1a9b7b73ebc02bd71c65b2b962d35 SHA-1: af65e29519865e67719860803de3e7c09c1615f0 SHA-256: 6c6826a0e4a6a89d29d438c2095192f14199f7cf80171c43b1f9dcb61a2952c5
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8720

Heuristics 4

  • 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
  • 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://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070aa9ca3b39---43313035173.pdf In PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/d9189e45c63f6c9b64e88877766a6187/86850518489.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/9351a64e891f49f261516c0662c1ac81/ribanurunimoxate.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc53743cd00---94814089502.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/2a78b886fe8a236214568a2f5ab7ea8a/mopudezevofiforajumega.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609af858142f4---basajuxuxarewigilojaw.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/3hois7gqdhu1nviqlj1v6umnea/38448022554.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b138dd35cbc91176336328fa35fbf21f/ribuzunimeleluga.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/37bd14ea16127c06f726fc371b50d95f/duzexuzabeloz.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/96415637862.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/dewebuwolebovurovaruk.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/23510863106.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24e933f770---nulelupupuxul.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/50417699879.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abcc73f083d---wufupalero.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608df1f7a4c52---gevaruxezuv.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/b3bc49a79cdf36961103e85a092b5b33/wimilazixesunomanulijo.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/e82fd2b3492f9fd26d03b0db98888212/1868997692.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=the+lost+symbol+audiobook+free+download+mp3PDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010cf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF1 5792 bytes
SHA-256: e7ff566d66f3d30edd94cde75c6764061f48648a682bdcc0ff3645a194cac9a0

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