Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6b4533d5e1a620…

MALICIOUS

PDF

84.9 KB Created: 2021-06-27 02:20:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 443028cd013d8953ab7568c38060ad76 SHA-1: a308bde743b534c3b6f93d9c3606b6a3ebb2896e SHA-256: cd6b4533d5e1a6206c9450f491efe581e7f37b05ad00a26949662467bf0567d4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised websites, including one hosted on christembassydocklands.org, which is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or scam purposes. The presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/a3629211e1d4dc0e070f72ff83107d14/bibutogetukexapozotor.pdf
    • http://fine-cottage.ru/userfiles/file/vefojexorugut.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/17771083b2ed85c1f413372e92303acd/78097499300.pdf
    • https://louvre.lv/res/wysiwyg/file/32283819137.pdf
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/ude5ut0g0i5kl55rtkj5o7bh1g/95669563927.pdf
    • https://gamasteel.net/userfiles/file/14643938443.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3741903b9a---nogetobanuwaranofajogabe.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b9bd580c01e---70958084960.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/ce65e10f4b32b12f7435e05b9ddef0a8/norine.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a757a04f672---waxaxor.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/7db4bda632904c55f78cdf2753a015ce/31746339982.pdf
    • http://ampletrekking.com/userfiles/file/luvibu.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/80de0e2160a0ecb785afa25ec32491c1/siradaru.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160899749781c4---xemam.pdf
    • http://yournamebadges.com/withyourdog/cms_uploads/file/90714287177.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/dlol01fe14ljokka9hlnkm9li4/44878621145.pdf
    • http://bilmatbasim.com/userfiles/file/2600674253.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/5059fbc5dcb6d6572f7d72a037c54c79/moxometug.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/7fihfso64hipdeo7lusqq0f96j/fikojego.pdf
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/bbf79e1d1dbd53f5bc0c69b9442e2e98/33271822616.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/0aa1f963cb36efacc0627f9fe0098451/66339653669.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/8kdjg2umtg5440p690m4a55vn3/44576693983.pdf
    • http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/96706083614.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad1f1cde22---kulidipisavupani.pdf
    • http://isagenixmakessense.com/ckfinder/userfiles/files/xuwuvuvinevajuz.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/5rc2o8744droj1rdnoh3nq09jm/98587799302.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=surface+area+of+a+cube+worksheet
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e633.bin
6d46d611226a9f8937a3035a3066a34114aa32bf75bd812f2bf6737096c41daa
pdf-font-stream PDF embedded font (sfnt) at offset 0xE633 17924 bytes
font_01_sfnt_off0001152c.bin
8650ece4a8dc38a3f180ca281a4b84daea2dd32e2cc4d742894fbc1c73d274bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x1152C 10684 bytes
font_02_sfnt_off00012df1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF1 16792 bytes