Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c0fcac3a207fea…

MALICIOUS

PDF

80.8 KB Created: 2021-09-16 17:24:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 04556f4e98a8edd8ff42c894563e6ba6 SHA-1: 52fde74cead144caf04b58c625049eee84d51f3c SHA-256: 69c0fcac3a207fea5f307548a02ed537aea6b1bc8451c994d1b71dbb7c034ce3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. It also features numerous external URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier further confirm its malicious nature, likely as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 https://allytemp.ru/uplcv?utm_term=electric+sheep+robotics PDF link annotation
    • http://chocoenglish.com/_UploadFile/Images/file/79111580096.pdfIn PDF document text
    • http://autoklej.pl/app/webroot/media/files/74680835602.pdfIn PDF document text
    • https://www.rongoldmanlaw.com/system/js/back/ckfinder/userfiles/files/jozirazudoxijivere.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/tajasixufujutevisariz.pdfIn PDF document text
    • https://bestrecycledautoparts.net/images_i/file/11713056785.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/5a138e7eda7e7c801aa7e2ed5e6aadf3/62350620064.pdfIn PDF document text
    • http://yuemeism.com/uploadfiles/files/tujuvizaxuzoja.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/f898dcurg1rd5o7rg5nhu3ma64/62376482647.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/e69uv6qtpu7aennbvi0lvnieha/52276362046.pdfIn PDF document text
    • http://manpukuorder.com/uploads/files/tupozusosekiwowizexur.pdfIn PDF document text
    • http://fsf-vastroad.com/userfiles/file/5465770845.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/lezonixikaxawozogofazofan.pdfIn PDF document text
    • http://eros-arena.com/eros/userfiles/file/ladofira.pdfIn PDF document text
    • http://dorisemitchell.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/55305688260.pdfIn PDF document text
    • http://schokofontaenen.de/idata/pirapugurujuz.pdfIn PDF document text
    • https://durgabas.coop.np/ckfinder/userfiles/files/15134064687.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/9ae7077106b10c3f066b42c4e0b86daa/8195029581.pdfIn PDF document text
    • http://aapltd.net/userfiles/file/71045909638.pdfIn PDF document text
    • http://xn--80aiddhbkcq5bcaz.xn--p1ai/upload/files/nugalasixa.pdfIn PDF document text
    • https://nikolsbeauty.com/webroot/f/uploads/file/gunuzofujivubegama.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161430ae5411c9---67982912829.pdfIn PDF document text
    • https://kapokcmassage.com/uploads/files/202109072128082723.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_off0000d7c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C4 18120 bytes
SHA-256: bd756bd7acf6384e7a682a3d2210221375aa38c188facf8b0a2f842e9129e804
font_01_sfnt_off000106c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011eda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDA 10328 bytes
SHA-256: 11a8e07e96f422062b799bd574e4d5e43efbd59833dc4dcbdc3bd60692739de5

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