Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7711a1b9bc200d2…

MALICIOUS

PDF

85.9 KB Created: 2021-07-01 12:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 6f8e05a12a0012af30329e8e96c301ca SHA-1: 0650ca34ef1380bcb4cf17aa9c3258e5ed229b32 SHA-256: a7711a1b9bc200d2a37820763c4b159a5d942dd036ceb31be404ab9701ed3bba
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were extracted, the structure and URL patterns are consistent with documents designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://sport-way.ru/img/file/74411464655.pdf In PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a14cfe6b2e4---35176185480.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/41726749180.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/29524747015.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/8576636582.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd50fa6f223---67007771540.pdfIn PDF document text
    • http://longvu.vn/Images_upload/files/muxudoli.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16071209473e7d---84569789475.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-6-28/20210628031617594942.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/60801285244.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/t1qu27hl69rn4tip6olq1ivec8/29767096590.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609afd30aad18---43942739981.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/hq6g6e56k1utmr03mcn6lm855a/lopebudigabumefar.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb6058ca73a---27862450257.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ace43dbae---tejirakurexabofuwurize.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160858129ca815---79394093469.pdfIn PDF document text
    • http://greenbrier101.com/userimages/jisoxumisavu.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c30e7586f54---6316205018.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/45365030578.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/12440741689.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160bda0863c438---34133275406.pdfIn PDF document text
    • https://www.myosiaffiliate.com/199trust/img/file/peziloke.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3a69ba214---50926452700.pdfIn PDF document text
    • http://studioagm.it/userfiles/files/58050285494.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/b81b85af517677e603f7785221f5e304/29040190811.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=red+yellow+blue+whitePDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA4 16552 bytes
SHA-256: 4336291e454627187522b99a13938a4ed9b888feea33c2819131518f39c650b5
font_01_sfnt_off000119a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131BD 10296 bytes
SHA-256: eb45a216dfc81f8a2f2e97473f8e9c788fc6448e59baa30978f76332873f38a3

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