Malicious PDF — malware analysis report

Static analysis result for SHA-256 cced900bc0dcedcc…

MALICIOUS

PDF

82.7 KB Created: 2021-09-02 16:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 010c61ef09603921bee6d2a5989fe0cc SHA-1: 66f9653925aad10dd2957ee8d3e2fcaf932f0036 SHA-256: cced900bc0dcedcc8e6caf96ad3d635417ef057dc808d6848db9bb59a24f6055
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating link farms on disposable hosting, suggesting an attempt to manipulate search engine rankings or host phishing content. The presence of external URIs and link farms strongly suggests the document's purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=land+rover+defender+2015+owners+manual PDF link annotation
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/33605041366.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd554636275---43500074620.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/xawerebesaxepemefawe.pdfIn PDF document text
    • http://placc.info/up_image/sizoximukilezanumiro.pdfIn PDF document text
    • https://abbma.in/admin/uploads/file/mutirepopave.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/0b0ea0c64af5d3ed1378627fde4bc468/xipewefudogixofexusagog.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/m2sbjida2v4ht3oh7vsip93u1c/59333080116.pdfIn PDF document text
    • https://autopsrus.com/ckfinder/userfiles/files/kokilopizanim.pdfIn PDF document text
    • http://studioguatta.it/userfiles/files/tatuvabesabidadobenubi.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/5bf2b304f22a7fbd1eaf46bf09ba8fdc/wefonetixumejasefeka.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/67652d609ae3680c18788c18ed7ba9e8/17934566037.pdfIn PDF document text
    • http://cuacuonductudong.com/upload/files/jotapowo.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/51911551584.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091947947743---25764555876.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a51700b262e---guxosivazepebebetebolor.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/likojozezuxalenixiro.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/dazimezexiko.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085510be2fdf---segatolok.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/7544418392267407a7d8d57413b8207d/18242019962.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c51a020c64---midiziru.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/s3nt4b71rc73hvlh2g3o6nrrhq/82481839663.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083c3bc7c716---54532832726.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/19683766024.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092081d647bf---69931298307.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_off0000db5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36C 18280 bytes
SHA-256: b0dd7bbb50bf3a7b5e51bbc8032a655e909b1c8648309f29853faf5d6f4b4458
font_02_sfnt_off00012309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12309 10964 bytes
SHA-256: f10dacdb4b97cbef2e090b7f9651c6048cf32289df65bb2a14ace95b182473fe

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