Malicious PDF — malware analysis report

Static analysis result for SHA-256 0646a76a888bfbe1…

MALICIOUS

PDF

81.5 KB Created: 2021-06-18 09:38:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: d3251075750be5297dab32d915880701 SHA-1: 81a3c5ef3c271614d20401bd89d98256d5d131e2 SHA-256: 0646a76a888bfbe195981c26a9fab6068bd7b1ae44ed759351c1d3196a87ec63
156 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on compromised CMS platforms. The document body, though heavily obfuscated, appears to be a lure related to 'Cia songs download malayalam', suggesting a phishing or scam attempt. The presence of multiple external URIs and the ML classifier's high confidence score indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=cia+songs+download+malayalam PDF link annotation
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b993d402da3---89719041795.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/54801920788.pdfIn PDF document text
    • https://ghnservizi.com/file/musanikejubipobogak.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce2e42ee0a---pesupadopirimusu.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071789cb7bcb---21520524268.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098f8cb7d1e5---pifetuvivibipotazezo.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a771b4d71d---56797885662.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a5902d4d8---68026047839.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/26e605a7b6b2e431c59c4e1e1c6bf66c/25023464644.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/791471a78f9251a029ff467df0242b08/99551164828.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4d9d423f1---kubofololagogado.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160adbc9f69d40---nopiwexaju.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/49834157906.pdfIn PDF document text
    • http://centreforeffectivecoaching.com/media/file/baxefidefavowepugina.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b5bdbf95ae3---74443315279.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/0817e6b0dccca9e0f76e8898b1ba8d03/3496827.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbd41c6e81---63730445725.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb502204b7---39545725400.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001038b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038B 5148 bytes
SHA-256: 79f6dbf76bda47d02d28d9cecbe3a67eb333b1aeee7a42cadff85f7d20269eec
font_01_sfnt_off00011517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11517 10840 bytes
SHA-256: b510699e8d3239afd9b2986ed1a00c74fb7278e2e03ac32329e2d87d0f0113b6

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