Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbe121e5a52a002c…

MALICIOUS

PDF

86.1 KB Created: 2021-02-13 00:00:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 211985d4ed5231c636f84b924d177e84 SHA-1: 2167fd3e2a09db9e78f3729a68e32f0fe4828ba1 SHA-256: fbe121e5a52a002c29d299f74088290206f6b322cf1374daa06b3f44e88a43eb
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly and other hosting services, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/123?utm_term=bali%2527s+best+coffee+candy+caffeine+content PDF link annotation
    • https://retariluwefise.weebly.com/uploads/1/3/4/8/134858211/6516592.pdfIn PDF document text
    • https://pozuzabo.weebly.com/uploads/1/3/4/4/134432083/9cb5718.pdfIn PDF document text
    • https://kapiromus.weebly.com/uploads/1/3/5/3/135345701/zavutudil.pdfIn PDF document text
    • https://cdn.sqhk.co/wujukipako/pXT7hgv/40865664975.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427097/normal_5fc68377a3857.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/fjjPidX/80s_mania_wrestling_returns_cheat_skye.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420767/normal_5fd92dfd3d2d5.pdfIn PDF document text
    • https://robivobaxo.weebly.com/uploads/1/3/0/8/130873737/rewatudogulodukebig.pdfIn PDF document text
    • https://xetakafiso.weebly.com/uploads/1/3/1/8/131856826/5578748.pdfIn PDF document text
    • https://cdn.sqhk.co/wimedizi/geslB0O/how_to_check_my_digicel_balance.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368999/normal_600876519deca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387706/normal_5ff800103d377.pdfIn PDF document text
    • https://cdn.sqhk.co/nalawanuxa/dtRhii8/59905437520.pdfIn PDF document text
    • https://fovojewonot.weebly.com/uploads/1/3/4/6/134669065/badimikox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/xujemudo.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/72598814183.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/engineering_graphics_essentials_with_autocad_2017_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/vejufupitasasew.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CC 12984 bytes
SHA-256: 1912fb40d98c574effde5f00ab0f0d3f65b5983dd5a4caf2e3fe5940979f21ea
font_01_sfnt_off00010fa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA4 5244 bytes
SHA-256: 8339b9418aad0be4a2197b86b7fc74483035b996de42d1c94e943c11e0a388ef
font_02_sfnt_off000121a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A1 11152 bytes
SHA-256: edae1d085649986e9ff7ecac083b737b474e929eb77215b6b5e037fbdc842a4f

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