Malicious PDF — malware analysis report

Static analysis result for SHA-256 08226c9e27b60f2b…

MALICIOUS

PDF

99.8 KB Created: 2021-06-27 22:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 1c030bd2bffce64389ba7c81e73a29f7 SHA-1: 99187622487f53b08b928feaf9fb5f5da3cd052c SHA-256: 08226c9e27b60f2b4c070b12f709288d1118cb4eb9fd19d47cd41e3b34b34f40
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to compromised WordPress sites, indicating a phishing or malicious redirection scheme. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The embedded links likely serve to direct users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ketchas.ru/uplcv?utm_term=flocculation+process+in+water+treatment PDF link annotation
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b54e6ba10c8---37068388647.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/a9052757977664e178279187b24d957a/sikamaliro.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/4e82c0669549a91d6637d97e3801efcb/lujamobozitawerat.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609baaae8613a---15691260596.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c716c07570d---lobajulelo.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/93679840963.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/45375299432.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160915e49cbfdf---26542605298.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd16a4cc53---40503176049.pdfIn PDF document text
    • http://instandee.com/Images_upload/files/nixunadop.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/4eb095964be46220bc444cdb5f044a06/99444598873.pdfIn PDF document text
    • http://93564497.com/userfiles/73650782280.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b04ec2b34db---76228960294.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160801b0c58e9d---lakiwexevakotojejurojunab.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4c52ef8d2---18565221999.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/sonexorupeme.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/o12hr2hl6dcj6ilem9kc652bj1/ninajiladirivaparofuf.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/47126421682.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804aa1462ee---peravamumul.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a26d932cdb---81415961708.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/gkra3apge8vvmmfcleqpbca9g1/tedezatakusufaxafaxe.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c23e62a67---piwiloritape.pdfIn PDF document text
    • 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_off00012227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12227 10696 bytes
SHA-256: 8ec537ded8a407614c5d305b1eb223ec1d2c3fbc421958a41a414173f5703825
font_01_sfnt_off00013ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000152d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152D3 18048 bytes
SHA-256: c89a0053f9f62b35cd6fd059e2dcfc47f3ca58f9a03b20e5521ea4e9ec05bf08

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