Malicious PDF — malware analysis report

Static analysis result for SHA-256 77172e34bddf2dde…

MALICIOUS

PDF

101.8 KB Created: 2021-05-23 09:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c4bba9f75018486179ec5b1322852f49 SHA-1: 34b6548e6afc8adccc25e7345b549a2d9644c60d SHA-256: 77172e34bddf2dde69a872ea274c857a540c2661ef88a76932e9e9a60e3d0351
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/0d04b2ca6447814df9834f29de6b24b6/bobawilexelur.pdf In PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/9687843f484b582093422db2f29e1251/tuxizarudilivafenaka.pdfIn PDF document text
    • http://kapli74.ru/upload_picture/vaxewel.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca62c3dde2---63846095422.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/5246e1923f496ff2919f6c84d43d3b8b/53975312301.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073c8dcb05a1---zikize.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/mopidapitegavibekexakewes.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/xadizusixafirisob.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/803fe533be6f77dc78f3db9158b8dc5d/xokaz.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/13435f317e6466d4a2028e8237e24437/veputivonosunezefuwokidu.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f2a3nqn51k6k85gnvtlvpt0ss1/75371640963.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/xidapivewu.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/23263941794.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4fd363ba6---61802216665.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/lanusikubemosi.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/59vbtbhlpr754kor57q9vd8s8o/33370123479.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/rega6kvqtpc7i4vrc7u14i0mhj/21721421495.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+remove+film+from+a+disposable+cameraPDF 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14431 5236 bytes
SHA-256: 3b06508a70e227244c10abca4047bb9cd10f8986aedadf0c4ed0160abc3c34bc
font_01_sfnt_off0001560d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1560D 11344 bytes
SHA-256: 38ca56f1ff70bf10863ccf3010b1007cf49375ad99f261c9300a9ec13282e083
font_02_sfnt_off00017cab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CAB 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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