Malicious PDF — malware analysis report

Static analysis result for SHA-256 801c0a5e900ad705…

MALICIOUS

PDF

90.1 KB Created: 2021-05-25 04:06:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 05c18ecd9f02e8c6f7a0f953ede3d584 SHA-1: 4a1526a89c60c11b99e37ea54ab50699d4c02af1 SHA-256: 801c0a5e900ad705e3e09788f096ff1d2a19c20ef883941e7141979bcc326b9e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to benign-looking documents, but one prominent URL is associated with a phishing lure for a game mod download. ClamAV and ML classifiers strongly indicate maliciousness, classifying it as a phishing trojan. The presence of embedded JavaScript, though not directly analyzed for specific actions, is often used in such documents to facilitate redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=sims+4+no+jealousy+mod+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4500882/normal_6004f21db4548.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461498/normal_6011f34c515fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459174/normal_60556b33c31ad.pdfIn PDF document text
    • https://gesojotumone.weebly.com/uploads/1/3/4/6/134614539/wetolexajufajivawo.pdfIn PDF document text
    • https://leresidatebij.weebly.com/uploads/1/3/0/7/130776374/simufufetawu.pdfIn PDF document text
    • https://rikelakejif.weebly.com/uploads/1/3/4/8/134885243/jowidafebo.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/penefelomiju/assessment_form_nursing.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/35343446749.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/wekati.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/10444131335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bbe43c4-db3a-44a8-beb8-f3648bb205f5/dungeons_and_dragons_modules_5e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e0ceddf-05ca-4526-bc3f-469643c0092c/adobe_premiere_pro_logo_intro_templates_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/293143be-b8c1-461d-acca-05326186af7f/specialised_cells_worksheet_ks3_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/are_titan_pressure_washers_any_good.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7713f93-4bd0-443d-b70c-87cf0cc0bd57/marie_de_france_lanval_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d499d9f-5a37-4bd6-897d-f247bf41fae1/imax_b6_error_connection_break.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/ipcc_fifth_assessment_report_concludes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6d1d3f2-3fc9-443a-bf70-b51e4d232765/how_do_you_structure_a_story.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/star_wars_thrawn_treason_epub.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/2010_buick_lacrosse_cxl_owners_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CB 3876 bytes
SHA-256: 5c7249727fd075087d19ee3d7c60f10da5135977c91ad634652b74e049d87f71
font_01_sfnt_off00011f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9E 5336 bytes
SHA-256: c365dcf629d7de7eba201ce603e1a6dbc906b3b18afbf6036a88e7cbe46fd022
font_02_sfnt_off000131d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131D1 12112 bytes
SHA-256: 82dd0e6f6e4309768b061a4fe8ac768035fef2e73a532819d03d4e42407a4b84

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