Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e7a7e0e32f0943d…

MALICIOUS

PDF

75.5 KB Created: 2021-01-10 01:11:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 4fe833a91d2a86903514d2473d07740b SHA-1: 74b6be970aa835173d8421aa0b46150fd8f3a912 SHA-256: 2e7a7e0e32f0943d601bc43a9f3e907b8d64a3dc01154a0688e6e5d87e0dcdef
156 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating malicious intent. The presence of numerous external links, such as 'https://traffset.ru/123?utm_term=hp+photosmart+7510', suggests a phishing or SEO spam campaign. ClamAV also detected it as 'Pdf.Phishing.Trojan'. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic strongly suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://traffset.ru/123?utm_term=hp+photosmart+7510 PDF link annotation
    • https://site-1176192.mozfiles.com/files/1176192/most_satisfying_slime_diy_videos_2019.pdfIn PDF document text
    • https://nazorilorapumug.weebly.com/uploads/1/3/0/7/130776423/nikifekexime.pdfIn PDF document text
    • https://site-1176222.mozfiles.com/files/1176222/wenezonolesuvotelevipo.pdfIn PDF document text
    • https://site-1227468.mozfiles.com/files/1227468/care_assistant_jobs_with_no_experience.pdfIn PDF document text
    • https://site-1176088.mozfiles.com/files/1176088/87362230101.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/rolefosiju/autonomic_nervous_system_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/escape_room_answers_level_132.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/focus_brevard_schools_student_login.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/fawomerolanilepunemuvan.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/nanugewolire.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/nfl_arizona_cardinals_injury_report.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/subefexufukejelu.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/56366132081.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/autodesk_maya_2013_free_trial.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/facebook_videos_online_mobile.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_off0000e88b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88B 5388 bytes
SHA-256: 4fdc3404664f94e31579c923d4eb6ed8d13b4ea2b0684cb1d8e56616bd435baf
font_01_sfnt_off0000fabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABE 11224 bytes
SHA-256: 321682c1130d1fa28fd7ca430c851e4ab9e63722c646ef274383800aa11458cb

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