Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c3fa9fa9d17916e…

MALICIOUS

PDF

69.2 KB Created: 2020-11-25 14:32:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5d7ba0ae278062b4f8b4df1fcd711030 SHA-1: 9eba93f01376e3993caf9c0ed8b4ae79f9a47a19 SHA-256: 6c3fa9fa9d17916e6deaf8926efd8547b0f1adb1476b74759cb823f22dc0d937
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or link farm attack. It contains numerous external links, including a primary URL that appears to be part of a lure for 'Anm form last date 2019 rajasthan'. The presence of a 'download button' heuristic further suggests a deceptive user interaction is intended. No scripts were extracted, but the overall structure and linked URLs point towards a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafficel.ru/aws?utm_term=anm+form+last+date+2019+rajasthan PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380883/normal_5fbc076dc0b4a.pdfIn PDF document text
    • https://mepopuwiv.weebly.com/uploads/1/3/4/4/134499337/6365507.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388038/normal_5f94228edd42c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453732/normal_5fa819cd8eb76.pdfIn PDF document text
    • https://zixotojene.weebly.com/uploads/1/3/4/3/134315054/bufajibegoruwotesi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387242/normal_5f8ceca574f9d.pdfIn PDF document text
    • https://jupisururixed.weebly.com/uploads/1/3/4/3/134339091/samodobo.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/tuxutedi/best_games_for_android_2019_video.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/bomb_calorimeter_experiment_procedure.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/sitton_spelling_4th_grade_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/intracranial_hemorrhage_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/85199245762.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_off0000cf8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8B 5692 bytes
SHA-256: 61fa5cb209ed94244591ae485c97f94f3b6af32f92fd789d2fef89cae45e1c3d
font_01_sfnt_off0000e2bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BC 10432 bytes
SHA-256: e174718c3615a6b9b684bdd1911efe1418569a818c016e512a1bb787fe4c3912

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