Malicious PDF — malware analysis report

Static analysis result for SHA-256 3042cab4dc9966e8…

MALICIOUS

PDF

101.8 KB Created: 2021-08-13 06:35:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9498552176b3d16497200c84fc544123 SHA-1: 8d418353cd9386708837a8134330167e092eb6cd SHA-256: 3042cab4dc9966e8921b7a183e2fb8aa81cac74b8fe55859a23d217de933f0f8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to numerous external websites, some hosted on compromised CMS platforms. The document's structure and embedded URLs suggest an attempt to manipulate search engine results or distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://archism.ru/uplcv?utm_term=personajes+de+la+obra+romeo+y+julieta+de+william+shakespeare PDF link annotation
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/tugubetudowanamupigakubo.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/0095141c71f397543ef2090373e6da1b/88114777121.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160f1a4cdbba6a---luvijitaxuveko.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c404a889a7---77720719906.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f44c41bb0b2---78060424814.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/15792485787.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/fejesesadojibimal.pdfIn PDF document text
    • http://vuonlan.vn/data/upload/files/9871343001.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/93d4875351069f7050c106d834fc484c/20950597246.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/sipinusepusifevowami.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/161007fa128ae3---xusizoma.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/okmvpkpmucbtrhvcr6g4nh79ei/kalis.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/9365427921.pdfIn PDF document text
    • https://kltccompany.com/ckfinder/userfiles/files/61142411688.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1607efa6b285f4---tipuxijosu.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/90348324264.pdfIn PDF document text
    • http://krupongs.com//images/file/39170434496.pdfIn PDF document text
    • https://ezastupitelstvo.sk/editor_uploads/system/files/48890113157.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/pevejeniwi.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/7ad60lulnbtsjb8mmdjt6n7825/48680350045.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/d01dk9cjf09s2ogv86ter65tei/misibugezibalidufaru.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_off000127ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14003 11320 bytes
SHA-256: 0bb13d02814fa864b9ba254795935c7f578999fd7b16e99b82b7c19411572086
font_02_sfnt_off00015a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A45 18324 bytes
SHA-256: 653398f5f52f0aac3fdf8e2e3dfd942a6e3d1804e210aaaae08c16325db30dce

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