Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b0939cc4ac1daa4…

MALICIOUS

PDF

84.3 KB Created: 2021-06-12 16:50:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 114da2094112ddd4230e5c6312cef44e SHA-1: 60f0636533a082c5e52230a8b0c4b8f01b9bbbc3 SHA-256: 5b0939cc4ac1daa4d8e02f343d20ae9c5a3a165e1595b1ffe8b5e14f215ee902
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. 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 0.9996

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://wastran.ru/uplcv?utm_term=bahubali+shiv+tandav PDF link annotation
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/0c52cf676804a396a746777e6af86d6a/1532469589.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/vibogitifikape.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1d4f3b8005dd5dd739bde8ad02dbd55a/vudavunejojaka.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/8b55b19305d8cea68f067d2bd7025080/febinipejavanewixu.pdfIn PDF document text
    • http://allasclub.com/campannas/file/93514179496.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/c29aade5a2f9ea9aa06b4119cab1b2fa/vumimoxefemubaxefa.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8e8813ad3---40437733846.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/9271780276.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/57172732926.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609651f2aece1---76613980745.pdfIn PDF document text
    • https://gofropack.com/wp-content/plugins/super-forms/uploads/php/files/309050e0f5547a758ea85bdae6c5e0ef/gonakudozogokukadijunone.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/jorepalagaketuxunisikupe.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085bfa590dad---40749389629.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160835bb120792---57567940618.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/d9a0e7cfd27eb5d15d5ce67105376673/64544161502.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071bc9da91b7---82506831087.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/e9ba70577531660c2034eab449c2b158/10829367060.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160adc9f477d73---virixajujine.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/88822690333.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE26 4720 bytes
SHA-256: 0c764ef352aff5fd98ee179eea6c1358b61335ef4e30df819ff63404ea62a000
font_01_sfnt_off0000fe14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE14 12384 bytes
SHA-256: dce29ae939f7d7c0d8530939bb24a2bc975b0380eae755bab74e367042d36f3a
font_02_sfnt_off000125e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E2 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
font_03_sfnt_off000133e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133E2 4056 bytes
SHA-256: bce7e7f2d7923dc2f3edcbcd1ce23e7eda1ead4608b4cee903aa1369b7dcad0b

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