Malicious PDF — malware analysis report

Static analysis result for SHA-256 8482e95676b940fb…

MALICIOUS

PDF

84.0 KB Created: 2021-05-26 07:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 283c0234e947d8494ac6cc87def4fbd5 SHA-1: f487a4664c1d8155d92d24914fb3a5e8d64294de SHA-256: 8482e95676b940fb1a4cbf5ff267b906d57c21ba78935d654a16512445135c6e
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 educational content, but one critical link to 'botokaw.ru' is flagged as suspicious. ClamAV and ML classifiers also identified this PDF as malicious, specifically as a phishing trojan. The presence of numerous links suggests a link farm or a method to obscure the malicious destination, which is a common tactic for phishing and malware distribution.

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://botokaw.ru/strik?utm_term=notion+de+fonction+3%25C3%25A8me+devoir+maison PDF link annotation
    • https://regezubigif.weebly.com/uploads/1/3/5/3/135320660/00220ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409818/normal_60136e21c8002.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418783/normal_604d5c23cdcef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428062/normal_5fe727cc4077f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385038/normal_6025de41b8aac.pdfIn PDF document text
    • https://sunarikibuniteg.weebly.com/uploads/1/3/1/3/131381519/2728787.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384029/normal_6058acba95682.pdfIn PDF document text
    • https://sepikiduluwad.weebly.com/uploads/1/3/4/4/134487701/f34c69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378164/normal_603ef8b128723.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/piradi/what_is_the_variety_of_living_things_in_an_ecosystem.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/suvegesuzuvogikokatijup.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/dogmatismo_vs_escepticismo.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/production_and_operations_analysis_mcgraw_hill.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/dd_3.5_complete_warrior_feats.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/inline_form_bootstrap_4_w3schools.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/fibajetamonugidinixap.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/1233054463.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/17082249386.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/how_much_does_a_hp_monitor_cost.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF251 5472 bytes
SHA-256: 544f87650c422c3be23da08f6866445f6796823fa3507ea4619c592aa72999de
font_01_sfnt_off0001049f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049F 11668 bytes
SHA-256: dca07ad8254bf8915319f4b59dff4e91107c8bd6a80c2cc0f4748061793dde32
font_02_sfnt_off0001291c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1291C 16732 bytes
SHA-256: 260750a269319fc399eaf86d8bd731828309ee50ff31641ed03f4064fb1692cf

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