Malicious PDF — malware analysis report

Static analysis result for SHA-256 095384ec33079652…

MALICIOUS

PDF

61.7 KB Created: 2020-11-10 11:31:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 94d0284d1be564fb49d0fee74bd896d2 SHA-1: 5539dee6c33473b791ee16ae8d0e9c1ee10b7c1b SHA-256: 095384ec33079652369c78a3efe1425ec0b58d06101ad647fbec2fba17d4bb43
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with a critical heuristic identifying it as a PDF redirector link pointing to malicious infrastructure. The document body, though heavily obfuscated, suggests a lure related to educational materials. The presence of multiple Weebly and f-static.net hosted PDFs indicates a link farm designed to distribute malicious content or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?keyword=egans+chapter+15+workbook+answers In PDF document text
    • https://navubenawegef.weebly.com/uploads/1/3/4/3/134320789/5682605.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f86f8954236e.pdfIn PDF document text
    • https://pimetagedipimop.weebly.com/uploads/1/3/1/6/131636886/83555da1e.pdfIn PDF document text
    • https://xelefivaj.weebly.com/uploads/1/3/4/2/134234850/8706162.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368777/normal_5f88624c9b92d.pdfIn PDF document text
    • https://vomediwanuxorat.weebly.com/uploads/1/3/4/3/134327005/3997258.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385847/normal_5f9db8416e4ae.pdfIn PDF document text
    • https://begaraga.weebly.com/uploads/1/3/4/6/134652864/bisamuwo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a89fd072-686d-4996-b168-d0622ec04641/printable_piano_notes_cheat_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05292078-daac-4f9a-85bf-c746c9414cbc/borderlands_2_mechromancer_dlc_free_download_xbox_360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85d8d03a-4204-4133-8499-007fe8662854/57278510087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10045567-4db7-4b7e-8a37-9e25b5d163eb/gajelorekeno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb79bfab-a208-4142-9dbb-a559b988a935/watch_battlestar_galactica_miniseries_online_free_megavideo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3193d350-3486-4670-9ef8-b71b8d32e05e/watch_madea_goes_to_jail_play_2006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95516d98-b60c-42b1-a50a-c21e1f08b871/ln46c630k1f_no_backlight.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_off0000b53c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB53C 5592 bytes
SHA-256: 196d8c513363823ff1075c4c1c64ae8287cad52673f5ab4770be5e4f9e016f5c
font_01_sfnt_off0000c85b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC85B 9752 bytes
SHA-256: 72b11d3311418b65dd35563295f0b1535fbc0ed799f4561a2ba5c5f386e7f37d

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