Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5be843424e59402…

MALICIOUS

PDF

83.3 KB Created: 2021-04-02 01:23:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 103c912d5ad7a68a03472e659d63d5c6 SHA-1: 76853e3d66bba021ce598f50853226200dd941bc SHA-256: e5be843424e59402330d19cebb822341b6981225d36572974552395aa4f2be9f
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which are likely part of a link farm designed to direct users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to exploit users by redirecting them to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/123?utm_term=remembrance+day+canada+esl+worksheets
    • https://gajifawegux.weebly.com/uploads/1/3/4/6/134649352/javudinatami-gufonena-vosabigaxuvudu-xotikema.pdf
    • https://cdn-cms.f-static.net/uploads/4501770/normal_6063e1299f0d3.pdf
    • https://mawoluzapulumar.weebly.com/uploads/1/3/6/0/136082117/a0b6186274f.pdf
    • https://lurofigugibax.weebly.com/uploads/1/3/4/6/134686006/wolazamarojo.pdf
    • https://static.s123-cdn-static.com/uploads/4476418/normal_600277b025bb7.pdf
    • https://direwuberegenis.weebly.com/uploads/1/3/4/3/134361890/4e3ea9e1e04.pdf
    • http://tegogigagozij.iblogger.org/30780334624.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://vebemer.epizy.com/12885619687.pdf
    • https://s3.amazonaws.com/wefadep/42317037571.pdf
    • https://uploads.strikinglycdn.com/files/c87f53e0-fcf5-44c6-8bf0-4d7597528eae/36836483793.pdf
    • https://uploads.strikinglycdn.com/files/e00d4197-1457-4055-a448-f43ede0b0852/kijoxafazigujeraxividezog.pdf
    • https://s3.amazonaws.com/dibedamoka/31849134445.pdf
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_704dc914c1394579a166f62d62c2213f.pdf?index=true
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_24fe9913145947d1a5d32627a0d6db06.pdf?index=true
    • https://uploads.strikinglycdn.com/files/bd7abc58-3614-4c28-af69-adb266ae9d11/the_adventures_of_sherlock_holmes_book_summary.pdf
    • https://uploads.strikinglycdn.com/files/4041f48f-4d10-4ce9-bfdf-bd3f875a791e/fapifogerumosugopufadad.pdf
    • https://s3.amazonaws.com/lososimap/business_case_study_format_example.pdf
    • http://sovawugudepoxav.rf.gd/34793872777.pdf
    • https://s3.amazonaws.com/zosevid/microsoft_word_travel_guide_template.pdf
    • https://d89d6b52-6e76-4e18-bccb-bd7428cfddad.filesusr.com/ugd/02beb7_6355694806494241afd4567de89b7bbd.pdf?index=true
    • https://6ce95562-7558-49ee-a7b0-b3003db3b0e9.filesusr.com/ugd/d13e1f_86ef35de44d14c80869c22936d401ac4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d013035e-5050-46e9-9028-cad557005789/coleman_electric_furnace_parts.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7df.bin
124a756b7088f81198adda4b386dffd98c4c0818b86f07dbc4503be9cccedf43		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DF 5324 bytes
font_01_sfnt_off000109d7.bin
85452c1eeb196967a0f603b021f71dd09eff556f9069bc691ac470ecdf42d440		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109D7 11208 bytes
font_02_sfnt_off00013004.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13004 4324 bytes

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