Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb5563931014d823…

MALICIOUS

PDF

64.1 KB Created: 2020-11-30 19:39:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 36aa0735a06a407ccd91be41ab45ad28 SHA-1: d5279b5bf15c62a0d7d85ea0f027b9eb213422e4 SHA-256: bb5563931014d8237a7de12e5c71e48c80aade0c733794148d2848fad41037d1
214 Risk Score

Malware Insights

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

The PDF contains a link to known malicious redirector infrastructure, indicating an attempt to lead the user to a harmful site. The heuristic 'PDF_SEO_LINK_FARM' suggests the document is part of a larger network of linked PDFs, likely for SEO manipulation or to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=multiplication+drills+2+5+10 In PDF document text
    • https://rosofofupamufi.weebly.com/uploads/1/3/4/3/134364257/83edc5.pdfIn PDF document text
    • https://jasunibimagimuf.weebly.com/uploads/1/3/4/7/134733129/94850478b.pdfIn PDF document text
    • https://nisutezobeta.weebly.com/uploads/1/3/4/4/134486685/9084182.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/gupuso/12835371945.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/92831511655.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/51472004850.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/17634909648.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/mivekogenefavu.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/arkansas_boaters_license_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/paella_pan_set.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/20553706253.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/rajubulubuzesatetak.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/dka_treatment_guidelines_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/vufaxamotodofokujopadirun.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_off0000bde8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDE8 5520 bytes
SHA-256: 866efcdfdad73f30f498c2a63f7163dc96b611a54660f37bfa0e735ba051cb87
font_01_sfnt_off0000d0cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CB 10316 bytes
SHA-256: e7ec6d90347d3e639703d651d1691fd504e65453269b5636e036936ab9dae1a7

Open this report in the interactive analyzer, or submit your own file for analysis.