Malicious PDF — malware analysis report

Static analysis result for SHA-256 94b025c4ee3c7e4c…

MALICIOUS

PDF

113.1 KB Created: 2021-07-02 07:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d7dce1b314caa6f420e6c1f8e9adfeae SHA-1: 6c62868924a8de662b4825f297f18deb5a3e117c SHA-256: 94b025c4ee3c7e4c5b41734b2e77d48b662cbd75f70b38ac307afe39d9b1b09d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://lamachine.nl/userfiles/file/vixivezo.pdf In PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607adbc6afe07---jasujeme.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/i2idcqt6m94jpb7ql1rou7m1pc/90468467715.pdfIn PDF document text
    • https://akita-inu.lv/www/files/files/kexizusewege.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/87104eb31679ef6492f6ddf8aa05da8e/51768474272.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c29a8d86671---81241627855.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/3f7e1969822de1ba803beb7464f1d7f0/kipizifopelarawu.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/78095817604.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/7v140r61d2797ga3nqs8a2d60r/20087169379.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160714a763fac3---30767203883.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608508773863a---nodizu.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffd7a6ca54---mosajofaf.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8f90ae51d---67718690232.pdfIn PDF document text
    • http://longvu.vn/Images_upload/files/pononerixi.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/63347651469.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/3d6b479a9839876d6e36fe79ad84a3a7/sebawimadune.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c07f5153bb---fuzawonuxovisovijimazuru.pdfIn PDF document text
    • http://stevis.cz/files/file/likenepoze.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/86649a31e74991ed5b8b1f6ba21d17f5/57796270916.pdfIn PDF document text
    • https://tasleemdubai.com/userfiles/files/31301868043.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/cltfo8ttd2huh2eic0m3798c64/98770809077.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/jivamabusesuzidesole.pdfIn PDF document text
    • http://peach2560.xyz/js/ckfinder/userfiles/files/39256451374.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/rt2dqo9immu2kmdn2hbuesn0b7/26924384477.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=kubectl+config+viewPDF 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F33 10464 bytes
SHA-256: 62cb5d869b7c3be92a8bc867598a95921d01bcd39d566a40f63c7bd8fa4c0c76
font_02_sfnt_off0001271e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1271E 17628 bytes
SHA-256: 5ecda2ed2f5af3038904b4f553f5a9b9315fc311bca0796c13ac77b9762c6e19
font_03_sfnt_off000155ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155EA 35092 bytes
SHA-256: 01e20a75f9805739d136b2809d148762d2dc62f308167878cc08df7615c76ba2

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