Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e74a28fd22b6f22…

MALICIOUS

PDF

102.1 KB Created: 2021-07-03 07:31:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 0962d817b47b81654fbd80eb4752c29f SHA-1: 85ce2e014eca54fabebd040fd8ce53982a1440c7 SHA-256: 8e74a28fd22b6f220e4b64d7042930792b42adc4f1d03ac4912758bb7060854a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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://pistant.ru/uplcv?utm_term=inconvenience+tamil+meaning PDF link annotation
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16084a4d84491e---sujodisivafoxofuwivof.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/u7ubikpmk6ga2ljrga4km2jl96/golobij.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/c96591cec0c435f7784fd35f00312a6f/tupexupesazijo.pdfIn PDF document text
    • http://hamdard.com/hamdard/app/webroot/img/ckfinder/userfiles/files/jurowupinubip.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb4facb65c---77981586170.pdfIn PDF document text
    • http://coss-wynn-reunion.com/clients/d/db/dbe3622004495b304d8703879a486b7d/File/20721868523.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608467b4d9bc9---relubokokolugatuzegib.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbfa2d58ff---11038923747.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16075ccc80f7fc---43291927980.pdfIn PDF document text
    • http://winso.tw/userfiles/file/gonimezujidedi.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/punukurelafevus.pdfIn PDF document text
    • http://maility.pl_adresuserfiles/file/35105718659.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b35b05a705e---12550773356.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/cqi713l7tspa7rnmecps9joibv/59637301307.pdfIn PDF document text
    • https://tsegypt.com/file/fotexasiliginelujubu.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160813bb37cc78---fakotaxikiromejoze.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/gcbr5r457v3aqhmo07u5oqjvk4/16471153573.pdfIn PDF document text
    • http://icloudcleaners.com/uploads/account/autoresponderfiles/53394504655.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/a0329be625bf117e730aace892bee86c/derapagixe.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/27e916966baf221ee7990c13e894c169/300404385.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/60092858150.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6734b73b5d---nakurujadevewupirigemi.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00015ca5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15CA5 18744 bytes
SHA-256: 7d74b639925c956379ff706e847dd6c22a8fdb5e3f017ab01a263dc20c1eeee7
font_00_sfnt_off0000f0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AE 10324 bytes
SHA-256: 913122454ef9cf5d6bcbcf30300249ff81b8a705cd8f85294995d80e6671f009
font_01_sfnt_off000107f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F4 25412 bytes
SHA-256: b5a1614e972a1d3f57c3eaf2326a30275afd3bc9a656a36ab716f5f907bfdeb6
font_02_sfnt_off00014494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14494 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00017bb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17BB0 3904 bytes
SHA-256: 1a00e7493e6709cec9dd7de6c7fab671c2d1d958760ea309603b60b15eef35ec

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