Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a253ac6de43fe2b…

MALICIOUS

PDF

85.2 KB Created: 2021-06-28 01:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a3f0828785c4b4759f2d43e4950abfb6 SHA-1: 094fff7a71d1ebd2b09a929527768e22c277101d SHA-256: 3a253ac6de43fe2b7efd4c694d682a18ece46f11375586627e9f80edc84fb581
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to compromised WordPress sites and link farms, suggesting a phishing or malware distribution attempt. The 'SE_INVOICE_LURE' heuristic indicates a potential payment scam. Although no scripts were directly extracted, the PDF structure and numerous external links point towards malicious intent, likely to trick users into downloading further malicious content or visiting phishing sites.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/e61a4d73fd62a458869e02fdbaa2dd8f/vidanarijubuvoxavozururid.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/99f5ba686f706d0c522c6c0d0cd398fe/15911805883.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609db4c91efe1---tiges.pdf
    • http://xiaohecollege.com/d/files/26484044377.pdf
    • https://ajitcoatings.com/uploads/74128699974.pdf
    • https://accuratesearch.com/userfiles/file/tawakawarox.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/6v3e698mhmk0odjp1u81bmcmh5/34621737405.pdf
    • http://bangkoksolarpower.com/syner_upload/images/files/10581773973.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a59d71cfb80---14091690386.pdf
    • https://biogenetixpharma.com/ci/userfiles/files/jaxejunefixodojuwabi.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824b33d6e8a---bimizemavimulirunonanori.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/8ddc9c811d34fbcfcf5932c8610d6ffc/xebowokuvulozuvexaxi.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16074ac9c299f2---kiwifuvelulapubalifij.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16083c101780a3---pojejuzinuroxer.pdf
    • https://zivotzaokny.eu/res/file/zuruzopasefumowosurur.pdf
    • http://childconnect.com/swi/fckfiles//file/didovadojo.pdf
    • https://office-agglo-larochelle.fr/userfiles/file/duguvelirumudugitix.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc5747d938---79783752676.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8adc580d3---diregilujirodeziwefovug.pdf
    • http://trendymamy.pl/userfiles/file/rovazulitigejuzipo.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160720bfc053fd---zinogomolofudebeg.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/a587b9f7eb7dfa07608d330527bed433/37851541947.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866125328f7---14530087587.pdf
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/65a6a9a09fb84d125cb035e869a348a8/wazigijupulixurobu.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b45056b4b8---31331582412.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/4r26mll545v6bjc5s5pqtbfod2/fizotidu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=attached+my+resume+for+your+reference
    • 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_off0000e901.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE901 16792 bytes
font_01_sfnt_off00010118.bin
a45392b5c9da54aaa3a55297fba365bd1063c7b725a4adb72c4d001bb89708f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10118 10796 bytes
font_02_sfnt_off000119db.bin
db21876273402326f74043c16ee4726c2518f350f7cd1b6a8bfb059ae29b771a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119DB 17380 bytes

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