Malicious PDF — malware analysis report

Static analysis result for SHA-256 cedd00c00e1260e6…

MALICIOUS

PDF

82.8 KB Created: 2021-07-14 03:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f019507b7a6ce372a3adc4c350fd8739 SHA-1: 2b7e4bd71b5142b996926438f0fe5917f7cff71b SHA-256: cedd00c00e1260e6290224b431ac5c0517f7c99959976abaaa7cb489dc48cd15
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and ClamAV as malicious, indicating a phishing or malware distribution attempt. It contains a large number of embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://garglob.ru/uplcv?utm_term=we+were+both+young+when+i+first+saw+u PDF link annotation
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c425b12be---67893339624.pdfIn PDF document text
    • http://first-group.kr/ckupload/files/8302351780.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/85217331561.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/ad9749c3bb17fbf946e868ecd6e30762/26785220838.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9f5cbdee6---rigepolapij.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9426ef275d---8786261472.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/67162365726.pdfIn PDF document text
    • http://cdhsalumni.com/clients/28864/File/suporibugolebokanulo.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5eaa1f325---baruxogelub.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9281031b3---pasokesojemiwira.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd2cc4ab13---laxezebubiwiboxazibog.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/b4vgq08gs88678al4p0l59fu7g/54388220398.pdfIn PDF document text
    • https://coevent.ru/upload/files/21249830812.pdfIn PDF document text
    • http://krukewittfarms.com/userfiles/file/tosafekijodomid.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/foxodusunokubawefa.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/ut9cce6gra5vd4cbg2tderh9i4/baxififedozugina.pdfIn PDF document text
    • http://gw73patriots.com/clients/1/1e/1ed986c9d410becccfd9995a8318e329/File/mubisof.pdfIn PDF document text
    • http://dragonspond.com/uploads/files/vizim.pdfIn PDF document text
    • http://blevy.com/ckfinder/userfiles/files/basekevulaja.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/sisefetiwop.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/67ee220912c68ba85a4d89af5f6465d8/koxolexomofo.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eddb8c307f0---ziguwotijozitibikevajuxu.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/19948676495.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_off0000dc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC39 18024 bytes
SHA-256: f6482fd2509ad2efbf6009043732cc6fb193bce91cef813e945bc3654e5e9942
font_01_sfnt_off00010aa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122BC 10880 bytes
SHA-256: 21593304b6a2c8036da2ccf01e08a418d5eead9cdc97262a4f559dc648f823dc

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