Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb87b069214aff90…

MALICIOUS

PDF

78.5 KB Created: 2021-04-18 19:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d733fb4b2d1d10959d0bfe7fa6fd24d6 SHA-1: 42c8dd502b5d6ed9655dd447bc1d1f7e29dc66fd SHA-256: eb87b069214aff904564dd614f0ea8dcac66943c74204366da2d4ce4c9604a4f
156 Risk Score

Malware Insights

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

The PDF contains a link farm and is classified as malicious by ML and ClamAV, indicating a phishing or malware distribution attempt. The document body, though heavily corrupted, suggests a lure related to resetting a Samsung soundbar, likely to trick users into clicking the malicious URL. No scripts were extracted, but the presence of numerous external links points to a phishing or content-scraping attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/strik?utm_term=how+do+i+reset+my+samsung+soundbar+hw+m360 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368238/normal_5fe55189286bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421056/normal_60325123e8c6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394071/normal_5fe9545f55868.pdfIn PDF document text
    • http://lubenoredeji.mypressonline.com/zawoxifopejafobevaxir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370530/normal_5fde4f0188c9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410000/normal_60177456c7684.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2cc935b2-b854-4d3d-8499-e3bac5ec7384.filesusr.com/ugd/2e82fc_3e1ef047dcff4b8f90a493c8d804b69a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/tonop.pdfIn PDF document text
    • http://lexaxixamu.rf.gd/modern_family_season_11_episode_1_script.pdfIn PDF document text
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_16b0ee5babf549448c4dad8293b47e0a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mufukep/722495088.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/porter_cable_fn250b_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/2011_rav4_2.5_oil_capacity.pdfIn PDF document text
    • http://beduxuluwuniva.rf.gd/viaje_alrededor_de_la_luna.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/bokajovorosoto.pdfIn PDF document text
    • http://jafixomedimun.onlinewebshop.net/guvikiwiv.pdfIn PDF document text
    • http://vulaxojanomu.rf.gd/auto_click_2._2_mega.pdfIn PDF document text
    • http://buvumurasamaku.rf.gd/97977303214.pdfIn PDF document text
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_75845e75e6bf41eeba532f58fa53b301.pdf?index=trueIn PDF document text
    • http://suzifoki.myartsonline.com/toluminosobosudodupux.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A7 5960 bytes
SHA-256: f0c21a9069bd3effe07b0917e52c637d078e9a415c13059785f7081e3a932d1f
font_01_sfnt_off000104d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D4 11308 bytes
SHA-256: 67c9d33e40ab79c43fa01f4cba2fe224182cbc5326561ce401e91f795a173029

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