Malicious PDF — malware analysis report

Static analysis result for SHA-256 8379cebc45a1b9da…

MALICIOUS

PDF

75.3 KB Created: 2021-04-06 22:31:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8879d7c165d4190b41c6d9e23e836cca SHA-1: 25c1d4e1b267d385c82379df139a8188934f31a8 SHA-256: 8379cebc45a1b9da62274a40aa4067df8c8ae724b18fafed94951d17eed7a0c0
164 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a common technique for phishing or distributing malware. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a mass of external PDF links, suggesting a malicious intent to redirect users to potentially harmful content. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://leonvi.ru/strik?utm_term=deepak+chopra+ageless+body+timeless+mind+pdf PDF link annotation
    • http://geesecam.com/kemonaxeluserorj7mq4.pdfIn PDF document text
    • http://siteninovubaba.22web.org/angiographic_report_duke_jeopardy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_60699cc216e58.pdfIn PDF document text
    • http://copyrightshelpscenters.com/kufifilpv43g.pdfIn PDF document text
    • http://3-bureaureport.info/autumn_in_new_york_sheet_music_pianoztqq6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376609/normal_60465e6a86f2e.pdfIn PDF document text
    • http://joxoxediva.22web.org/60055952697.pdfIn PDF document text
    • http://metryck.info/1977_dodge_sportsman_rv_specsy8th0.pdfIn PDF document text
    • http://gramnews.xyz/4187548404uuu8u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426271/normal_60466e53ddf7e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1c437d0a-cccb-4a8a-93f1-39e0b5126915.filesusr.com/ugd/b91566_4cd1df8aa05d438c9ba073f7cfbe35b3.pdf?index=trueIn PDF document text
    • https://2e8e3215-33bf-4fe1-bc67-b38dac560527.filesusr.com/ugd/269bb8_e159a6a3e702456190c23aeef33b1cef.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bepukuba/bowatugu.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/48913079716.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/bulk_images_from_facebook.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/recurring_deposit_calculator_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/strategic_management_ebook.pdfIn PDF document text
    • https://f4ef19d8-372f-49db-bbb6-0f5e16bfa625.filesusr.com/ugd/070799_bc9f62878b004feb814e12cf47920973.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lekezaru/fumigotekanamola.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/tudamubetam.pdfIn PDF document text
    • https://e24ff460-1725-4b9d-a7de-f8438c38fea0.filesusr.com/ugd/366850_2dd8f39789af4bec89ffa5b5f8b6bd19.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mokamoba/efl_league_2_form_guide.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_off0000e3ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EA 5876 bytes
SHA-256: eef808359f7bc8a0570054b2862d3981df485ca1c260ba56ab54ad73a1df01aa
font_01_sfnt_off0000f7ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CE 11992 bytes
SHA-256: d5864139ea792458e2d48a98678b592c1396a37e631c8b2df3f87015887640a9

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