Malicious PDF — malware analysis report

Static analysis result for SHA-256 e000872d6ae74757…

MALICIOUS

PDF

74.2 KB Created: 2021-04-04 18:09:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 32f6f2d76fb1f63372c0e71c9b745c7f SHA-1: e2d63d6d4836f0e40d5117531315a66f19a49872 SHA-256: e000872d6ae7475793a63a5d2b479098f5de6331bc65effd165ac5094416880d
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://pelibifir.ru/award?keyword=livro+o+alienista+caleb+carr+pdf PDF link annotation
    • http://subbellassecret.com/tamil_padam_2_audio_songgvowf.pdfIn PDF document text
    • http://sesulig.22web.org/paxiwigowara.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483586/normal_6038d1cacd29d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426059/normal_600efd0fae0a3.pdfIn PDF document text
    • http://labijubitif.iblogger.org/importancia_de_los_aditivos_alimentarios.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413701/normal_603235b089875.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420906/normal_603e869613385.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476780/normal_5ff77fe8cd2ba.pdfIn PDF document text
    • http://xojudesabesone.66ghz.com/creditors_list_template_excel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412573/normal_602bf4529a207.pdfIn PDF document text
    • http://vuvepexuja.22web.org/pantum_p2500w_wifi_password.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388835/normal_5fe7688566fc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368952/normal_605aeb7a023bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407983/normal_603fcd366f1eb.pdfIn PDF document text
    • http://arnautmebel.ru/97514572268hkmlw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_ee487e1a247749e48107a559df52c12a.pdf?index=trueIn PDF document text
    • http://movetodosewa.rf.gd/gewelodixofodapevemuv.pdfIn PDF document text
    • https://3f735f5a-cd1c-4288-bd93-adeff6e084d9.filesusr.com/ugd/bcc0e4_a8337812eede4f0d8480e075c585d840.pdf?index=trueIn PDF document text
    • http://wigebinijeg.epizy.com/punctuation_worksheets_high_school.pdfIn PDF document text
    • http://betewegomoge.epizy.com/53734748856.pdfIn PDF document text
    • https://64b67c6e-fbbd-4787-add8-9ed3e274c95c.filesusr.com/ugd/eb6612_5a77dcf14ab443e08330a1077ec06a04.pdf?index=trueIn 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_off0000dfb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB6 5292 bytes
SHA-256: c0102a22a1702a3bbcbc84b7f5e584f0904c33d2da07f599efeb7be0bf3c76d8
font_01_sfnt_off0000f1c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C5 13960 bytes
SHA-256: 4413a552fb311530f62ee2e49fbfa558d8c9036bdf90aa5e4322899b2e4d57e5