Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fe6e24a2da27db2…

MALICIOUS

PDF

87.6 KB Created: 2021-07-03 08:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 1eb06d3a4af203430aca140e9c721a9b SHA-1: 5c0478262d8eb022200b56c3e4a76b5f7b64dd16 SHA-256: 1fe6e24a2da27db2ef006e74425472486777f8346b8f736578926973d1c0400c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to other PDF files hosted on compromised WordPress sites and disposable hosting. The primary purpose appears to be directing users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://huntic.ru/uplcv?utm_term=mod+rules+of+survival PDF link annotation
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/vudipul.pdfIn PDF document text
    • http://cdkkck.com/uploadfile/file/20210531032653.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/36981416ea09a5fd4d35cbc13f8fc541/65031958836.pdfIn PDF document text
    • http://canvangdientu.com/images/file/24995231294.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160739eccd7cde---kutaridawazopiba.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160793943aa7b3---11893665190.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b70290c2c0---wugikafukozigakepig.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607175ba884ef---3396534712.pdfIn PDF document text
    • http://helpibr.org/clients/f/fe/feaff840d005acecac0f151e8679c8db/File/50566480804.pdfIn PDF document text
    • https://baatco.com/ckfinder/userfiles/files/3509693108.pdfIn PDF document text
    • https://hurghadalife.net/userfiles/files/33845372266.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/104db0dbb86dbaa316e62be048c9048c/24485001624.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/solebuvibebarutu.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/f830fac21eee349987de35dedeeb28b2/65344222482.pdfIn PDF document text
    • http://rentaruedas.com/files/others/29569674469.pdfIn PDF document text
    • http://citra.cl/userfiles/file/74256128342.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/967198b7f9a0026ccb8970d86f878889/pikomevadosijexokezivumi.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ffbd9e5cf---jiripevilorefedoleweli.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609566dbbdadd---rowusidakakuxuwiguzuk.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e11f91289---36237684181.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a51ffea3431---viberolobotepi.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/49292333552.pdfIn PDF document text
    • http://miroslaws.com/ckfinder/userfiles/files/14463651138.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/dubiwaronitokogim.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_off0000e8a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BA 28552 bytes
SHA-256: e7dd72b86813d55c6558b6b4b21c97489ba0c4138864d5b06d12e6d1628f8170
font_02_sfnt_off000139d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139D5 10304 bytes
SHA-256: c929c0ff8d6804ee5009bf371fa7ad6074d509b5840722e1445f68ab0b912363

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