Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2e5cc4e3cf550c0…

MALICIOUS

PDF

76.8 KB Created: 2021-05-23 13:12:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4fa3c13e9b68a9e1561d89e3def83f49 SHA-1: 056f27aa4e58fd86d7211ce285400f275e820fb1 SHA-256: b2e5cc4e3cf550c002351bbfa531e9e9032c2acf6e951d336120512b7b200110
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on platforms like Weebly. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The embedded URL also suggests a malicious redirection attempt.

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://pelibifir.ru/strik?utm_term=transformers+prime+bumblebee+theme+song+lyrics PDF link annotation
    • https://tapegijenokog.weebly.com/uploads/1/3/4/3/134376615/rovasoz.pdfIn PDF document text
    • https://gewilowada.weebly.com/uploads/1/3/0/7/130776716/muvaradalara-jobifa-luzawem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452865/normal_601817285106c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470024/normal_60560229be126.pdfIn PDF document text
    • https://pojikajuruwasi.weebly.com/uploads/1/3/2/6/132695468/2ba1be7351062.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486193/normal_60372d3e51730.pdfIn PDF document text
    • https://lexobazotukagof.weebly.com/uploads/1/3/1/4/131407042/9838021.pdfIn PDF document text
    • https://xidolunojedi.weebly.com/uploads/1/3/1/0/131069950/xajinov.pdfIn PDF document text
    • https://womogidukiwu.weebly.com/uploads/1/3/4/8/134873304/147a70a65138772.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449965/normal_6030ea3e81c5e.pdfIn PDF document text
    • https://gizaluta.weebly.com/uploads/1/3/5/3/135345368/deterepivew.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/tuxalowafokuvo/85471592577.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/79677843851.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/tojutuv.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/12936097495.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/56131993579.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/95231258195.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/amritsar_tourist_guide_map.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/pavotatudifafope.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_off0000ee88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE88 5620 bytes
SHA-256: 35650a58f8dd6610bd5d4cd29c7a6798c2bd6c2257ded27dea3331d782ae6d37
font_01_sfnt_off0001017c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017C 10776 bytes
SHA-256: 06b733505b9f44358660d0eac5e3276bd9f2440d58b890893c2d5e2b11d219ba

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