Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b08bcf33023456…

MALICIOUS

PDF

73.5 KB Created: 2021-03-23 00:07:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 049f9bbb48ec72d8669480129964806d SHA-1: 8f6c93688b63754addf71116e969b9be4b518b4f SHA-256: 06b08bcf33023456f546630a080fab8a6ed4ad43a7d7f2faf65c9e44937a8024
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malicious intent. It contains a large number of external links, suggesting it's part of a link farm designed to direct users to potentially harmful websites. The document body, though heavily obfuscated, contains keywords related to search terms, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/award?keyword=asme+standards+book+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4529149/normal_5fd3c499bcb23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459164/normal_5fe58c10e4ff6.pdfIn PDF document text
    • https://vixikubinimagap.weebly.com/uploads/1/3/3/9/133997110/6e133a793.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484999/normal_60531128d463b.pdfIn PDF document text
    • https://luwojasog.weebly.com/uploads/1/3/1/3/131380471/6313472.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/pasutiz/what_is_the_best_answer_for_biggest_weakness.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/jinufesavizur.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/65861290944.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/riwabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6107ff3e-5b63-4588-81ae-8d793c81873f/3655459081.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/59072131186.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/42589900262.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/gegasolexawekimubiju.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/best_deal_on_front_loader_washer_and_dryer.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/61704419012.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/game_center_account_on_android.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/bowaleti.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/manual_da_cetesb_areas_contaminadas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f65397c5-09b2-4994-8a9b-ada0c6bc5656/49622361501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5133cd87-74b5-4b72-bfd0-3b8a734ed0f0/polaris_rzr_xp_turbo_service_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF45 5348 bytes
SHA-256: 7d75e8eedcf3e729ab070e1e46d58961b1d0be6c7b4f81dd208f1e2fc8930781
font_01_sfnt_off0000f155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF155 11784 bytes
SHA-256: 96815ae0e51ee18a7bea8ab981c8c09ddf0ab0f542208b434bfb439b72259e40

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