Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccddf7e43295d5d6…

MALICIOUS

PDF

98.0 KB Created: 2021-08-02 18:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a0305e4cf56bc76ff38ac530576ae1f2 SHA-1: 85c3f4171f82847388de7d6aa5083f0e78ec7b50 SHA-256: ccddf7e43295d5d631cc05d3b146955a7f6a0a416e7fb89fccc9d31b137f0711
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/27bttj66naat92i0of6s2a3l91/pirurepereba.pdf In PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/ae39974757b6fddc178a816360460149/53574713083.pdfIn PDF document text
    • http://xn--80aawifdlfr.xn--p1ai/ckfinder/userfiles/files/63656511059.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/levog.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/72382806595.pdfIn PDF document text
    • https://lexconsulting.ro/webroot/files/media/koxenefirozu.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c976b1d21ab---wojonurefamomebug.pdfIn PDF document text
    • https://giovannicaputoboutique.com/file/fabusosidatuduni.pdfIn PDF document text
    • http://jhferry.com/data/fckeditor/file///12231167972.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161056b5bb8687---fimibatilulojej.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/be63c7a728de27980196ef724e06ff9c/54858997796.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/wibuwijatobimolovuluze.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090edff5edb8---pulusanade.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fff41a841e---dubaxewizogijunodikuvamix.pdfIn PDF document text
    • https://aaaxxion.info/images/file/67286002818.pdfIn PDF document text
    • https://alsultantrading.ae/userfiles/files/fajipadalokotujapope.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/65491575768.pdfIn PDF document text
    • http://leebyunghun.org/new/upload/board/files/76554157889.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc2db7bfc8---17287875911.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b581489fd51---jitagilixuzejokukimarura.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/c9c4b2a67f3ebf23fdb241117aa63b0d/35597114108.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/18916379021.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/mozodurinofoxenevaluziz.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/i6c2o7b29iuc6484spngdpmoto/xopapimuxogezimexojamuwe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=mx+player+pro+mod+apk+2021+latest+version+downloadPDF 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_off0000ffd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD5 17696 bytes
SHA-256: 13005c360082e47e7e3ac2f6c5aecfa793c2def9ecc1fe3067ac694be35305aa
font_01_sfnt_off00012e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E81 11300 bytes
SHA-256: 7ae99bfe87e8e29a6a8a322013a667b2fb732b17e0a2f829103dcd535c0991fe
font_02_sfnt_off00014940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14940 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00016151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16151 16304 bytes
SHA-256: 72b6d5534888ecec27fd68dccf88827b5fbc3510db23809d90398b76a33fedee