Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee6af90a1a27cb3…

MALICIOUS

PDF

83.7 KB Created: 2021-09-06 18:16:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 393ff442d96e4dfd2f7f04dbc12bc689 SHA-1: 2aaac13dad01803a5ee6cc34f32913598ec0c150 SHA-256: 8ee6af90a1a27cb3a41c79c512b93da063c118492eeed89ae9c84bddc193e52f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or SEO spam. No scripts were extracted, but the structure and URL distribution are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 http://bluecreator.biz/ckfinder/userfiles/files/1155833209.pdf In PDF document text
    • https://genegurumiraclehealer.comuserfiles/file/30803978539.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16100810562da0---mivukisisasojomazarumep.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac486eb912a---68001911498.pdfIn PDF document text
    • http://keacg.com/upload/files/jebubixifapum.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/f46b676fca367e719010cebaa00ec968/81017717141.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/jonobuf.pdfIn PDF document text
    • http://maxkbm.com/clients/2/28/28fcaa936e2ecbeb6c9a97ea0f1ab253/File/wizexafos.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/dovijidinopuvawibunupezi.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/b2b5b3459e7e333a266e5979a69f64e2/giboni.pdfIn PDF document text
    • https://lufty.cz/UserFiles/files/gexuwunux.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/eor40hahht9nn78v079h0pf1tb/juvododazatumeb.pdfIn PDF document text
    • http://titusrelay.com/clients/e/ef/ef304ccc03541e9e6382bef5f13b0a7d/File/92624709336.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcfa180618a---mozewesaruvesevu.pdfIn PDF document text
    • https://ssmahavidyalaya.org/lion/uploadedfiles/fck/files/file/7161839733.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/32701538601.pdfIn PDF document text
    • http://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/3v241gp4mnr7td4leracvcdr52/xopisuteni.pdfIn PDF document text
    • http://matkinhantai.com/luutru/files/sukupadolimixitijafisotar.pdfIn PDF document text
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/23919110405.pdfIn PDF document text
    • http://derma-dts.de/files/file/sobasasezebopuxerapamet.pdfIn PDF document text
    • http://goldenagegroup.vip/userfiles/file/75419661929.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20210811064238.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/74068729250.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/3b89b0d1b73fda064c9c3733f7601429/79938945143.pdfIn PDF document text
    • https://burgaseguros.com/userfiles/file/68551617922.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=hamilton+beach+rice+cooker+manual+37535PDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/357f4644a43727ce68ba7a867da4db5c/tosomovetefaxuzove.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_off0000e0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D7 11008 bytes
SHA-256: 05e9c82b690cecdbb0ad79f5a4d110990a0765a3ec825402e691a563283b7a51
font_01_sfnt_off0000fa31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA31 17972 bytes
SHA-256: d245f2294a50bbb686d38296274c32279b9e0aff4e49ef0346ed81d31aabf900
font_02_sfnt_off000128ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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